Warnings with Maven 4 when importing spring-boot-dependencies BOM

[mhalbritter]

Using

> mvn --version 
Apache Maven 4.0.0-rc-1 (d81b1b6a2870dc954d6d642500ad38e8e4cb3dde)

When creating a POM which imports our spring-boot-dependencies through

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-dependencies</artifactId>
                <version>${spring-boot.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

I'll get a lot of warnings about "Ignored POM import":

[WARNING] 
[WARNING] Some problems were encountered while building the effective model for 'my.group:lib:jar:1.0.0-SNAPSHOT'
[WARNING] Ignored POM import for: io.micrometer:micrometer-commons:jar:1.14.0@compile as already imported io.micrometer:micrometer-commons:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM. @ org.springframework.boot:spring-boot-dependencies:3.4.0
[WARNING] Ignored POM import for: io.micrometer:micrometer-core:jar:1.14.0@compile as already imported io.micrometer:micrometer-core:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM. @ org.springframework.boot:spring-boot-dependencies:3.4.0
[WARNING] Ignored POM import for: io.micrometer:micrometer-jakarta9:jar:1.14.0@compile as already imported io.micrometer:micrometer-jakarta9:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM. @ org.springframework.boot:spring-boot-dependencies:3.4.0
[WARNING] Ignored POM import for: io.micrometer:micrometer-java11:jar:1.14.0@compile as already imported io.micrometer:micrometer-java11:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM. @ org.springframework.boot:spring-boot-dependencies:3.4.0
[WARNING] Ignored POM import for: io.micrometer:micrometer-java21:jar:1.14.0@compile as already imported io.micrometer:micrometer-java21:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM. @ org.springframework.boot:spring-boot-dependencies:3.4.0
[WARNING] Ignored POM import for: io.micrometer:micrometer-jetty11:jar:1.14.0@compile as already imported io.micrometer:micrometer-jetty11:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM. @ org.springframework.boot:spring-boot-dependencies:3.4.0
[WARNING] Ignored POM import for: io.micrometer:micrometer-jetty12:jar:1.14.0@compile as already imported io.micrometer:micrometer-jetty12:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM. @ org.springframework.boot:spring-boot-dependencies:3.4.0
[WARNING] Ignored POM import for: io.micrometer:micrometer-observation:jar:1.14.0@compile as already imported io.micrometer:micrometer-observation:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM. @ org.springframework.boot:spring-boot-dependencies:3.4.0
[WARNING] Ignored POM import for: io.micrometer:micrometer-observation-test:jar:1.14.0@compile as already imported io.micrometer:micrometer-observation-test:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM. @ org.springframework.boot:spring-boot-dependencies:3.4.0
[WARNING] Ignored POM import for: io.micrometer:micrometer-registry-appoptics:jar:1.14.0@compile as already imported io.micrometer:micrometer-registry-appoptics:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM. @ org.springframework.boot:spring-boot-dependencies:3.4.0
[WARNING] Ignored POM import for: io.micrometer:micrometer-registry-atlas:jar:1.14.0@compile as already imported io.micrometer:micrometer-registry-atlas:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM. @ org.springframework.boot:spring-boot-dependencies:3.4.0
[WARNING] Ignored POM import for: io.micrometer:micrometer-registry-azure-monitor:jar:1.14.0@compile as already imported io.micrometer:micrometer-registry-azure-monitor:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM. @ org.springframework.boot:spring-boot-dependencies:3.4.0
[WARNING] Ignored POM import for: io.micrometer:micrometer-registry-cloudwatch2:jar:1.14.0@compile as already imported io.micrometer:micrometer-registry-cloudwatch2:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM. @ org.springframework.boot:spring-boot-dependencies:3.4.0
[WARNING] Ignored POM import for: io.micrometer:micrometer-registry-datadog:jar:1.14.0@compile as already imported io.micrometer:micrometer-registry-datadog:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM. @ org.springframework.boot:spring-boot-dependencies:3.4.0
[WARNING] Ignored POM import for: io.micrometer:micrometer-registry-dynatrace:jar:1.14.0@compile as already imported io.micrometer:micrometer-registry-dynatrace:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM. @ org.springframework.boot:spring-boot-dependencies:3.4.0
[WARNING] Ignored POM import for: io.micrometer:micrometer-registry-elastic:jar:1.14.0@compile as already imported io.micrometer:micrometer-registry-elastic:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM. @ org.springframework.boot:spring-boot-dependencies:3.4.0
[WARNING] Ignored POM import for: io.micrometer:micrometer-registry-ganglia:jar:1.14.0@compile as already imported io.micrometer:micrometer-registry-ganglia:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM. @ org.springframework.boot:spring-boot-dependencies:3.4.0
[WARNING] Ignored POM import for: io.micrometer:micrometer-registry-graphite:jar:1.14.0@compile as already imported io.micrometer:micrometer-registry-graphite:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM. @ org.springframework.boot:spring-boot-dependencies:3.4.0
[WARNING] Ignored POM import for: io.micrometer:micrometer-registry-health:jar:1.14.0@compile as already imported io.micrometer:micrometer-registry-health:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM. @ org.springframework.boot:spring-boot-dependencies:3.4.0
[WARNING] Ignored POM import for: io.micrometer:micrometer-registry-humio:jar:1.14.0@compile as already imported io.micrometer:micrometer-registry-humio:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM. @ org.springframework.boot:spring-boot-dependencies:3.4.0
[WARNING] Ignored POM import for: io.micrometer:micrometer-registry-influx:jar:1.14.0@compile as already imported io.micrometer:micrometer-registry-influx:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM. @ org.springframework.boot:spring-boot-dependencies:3.4.0
[WARNING] Ignored POM import for: io.micrometer:micrometer-registry-jmx:jar:1.14.0@compile as already imported io.micrometer:micrometer-registry-jmx:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM. @ org.springframework.boot:spring-boot-dependencies:3.4.0
[WARNING] Ignored POM import for: io.micrometer:micrometer-registry-kairos:jar:1.14.0@compile as already imported io.micrometer:micrometer-registry-kairos:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM. @ org.springframework.boot:spring-boot-dependencies:3.4.0
[WARNING] Ignored POM import for: io.micrometer:micrometer-registry-new-relic:jar:1.14.0@compile as already imported io.micrometer:micrometer-registry-new-relic:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM. @ org.springframework.boot:spring-boot-dependencies:3.4.0
[WARNING] Ignored POM import for: io.micrometer:micrometer-registry-opentsdb:jar:1.14.0@compile as already imported io.micrometer:micrometer-registry-opentsdb:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM. @ org.springframework.boot:spring-boot-dependencies:3.4.0
[WARNING] Ignored POM import for: io.micrometer:micrometer-registry-otlp:jar:1.14.0@compile as already imported io.micrometer:micrometer-registry-otlp:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM. @ org.springframework.boot:spring-boot-dependencies:3.4.0
[WARNING] Ignored POM import for: io.micrometer:micrometer-registry-prometheus:jar:1.14.0@compile as already imported io.micrometer:micrometer-registry-prometheus:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM. @ org.springframework.boot:spring-boot-dependencies:3.4.0
[WARNING] Ignored POM import for: io.micrometer:micrometer-registry-prometheus-simpleclient:jar:1.14.0@compile as already imported io.micrometer:micrometer-registry-prometheus-simpleclient:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM. @ org.springframework.boot:spring-boot-dependencies:3.4.0
[WARNING] Ignored POM import for: io.micrometer:micrometer-registry-signalfx:jar:1.14.0@compile as already imported io.micrometer:micrometer-registry-signalfx:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM. @ org.springframework.boot:spring-boot-dependencies:3.4.0
[WARNING] Ignored POM import for: io.micrometer:micrometer-registry-statsd:jar:1.14.0@compile as already imported io.micrometer:micrometer-registry-statsd:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM. @ org.springframework.boot:spring-boot-dependencies:3.4.0
[WARNING] Ignored POM import for: io.micrometer:micrometer-registry-wavefront:jar:1.14.0@compile as already imported io.micrometer:micrometer-registry-wavefront:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM. @ org.springframework.boot:spring-boot-dependencies:3.4.0
[WARNING] Ignored POM import for: io.micrometer:micrometer-test:jar:1.14.0@compile as already imported io.micrometer:micrometer-test:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM. @ org.springframework.boot:spring-boot-dependencies:3.4.0
[WARNING] Ignored POM import for: org.apache.maven.plugin-tools:maven-plugin-annotations:jar:3.7.0@compile as already imported org.apache.maven.plugin-tools:maven-plugin-annotations:jar:3.13.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM. @ org.springframework.boot:spring-boot-dependencies:3.4.0
[WARNING] Ignored POM import for: io.micrometer:micrometer-commons:jar:1.14.0@compile as already imported io.micrometer:micrometer-commons:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM. @ org.springframework.boot:spring-boot-dependencies:3.4.0
[WARNING] Ignored POM import for: io.micrometer:micrometer-core:jar:1.14.0@compile as already imported io.micrometer:micrometer-core:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM. @ org.springframework.boot:spring-boot-dependencies:3.4.0
[WARNING] Ignored POM import for: io.micrometer:micrometer-jakarta9:jar:1.14.0@compile as already imported io.micrometer:micrometer-jakarta9:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM. @ org.springframework.boot:spring-boot-dependencies:3.4.0
[WARNING] Ignored POM import for: io.micrometer:micrometer-java11:jar:1.14.0@compile as already imported io.micrometer:micrometer-java11:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM. @ org.springframework.boot:spring-boot-dependencies:3.4.0
[WARNING] Ignored POM import for: io.micrometer:micrometer-java21:jar:1.14.0@compile as already imported io.micrometer:micrometer-java21:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM. @ org.springframework.boot:spring-boot-dependencies:3.4.0
[WARNING] Ignored POM import for: io.micrometer:micrometer-jetty11:jar:1.14.0@compile as already imported io.micrometer:micrometer-jetty11:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM. @ org.springframework.boot:spring-boot-dependencies:3.4.0
[WARNING] Ignored POM import for: io.micrometer:micrometer-jetty12:jar:1.14.0@compile as already imported io.micrometer:micrometer-jetty12:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM. @ org.springframework.boot:spring-boot-dependencies:3.4.0
[WARNING] Ignored POM import for: io.micrometer:micrometer-observation:jar:1.14.0@compile as already imported io.micrometer:micrometer-observation:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM. @ org.springframework.boot:spring-boot-dependencies:3.4.0
[WARNING] Ignored POM import for: io.micrometer:micrometer-observation-test:jar:1.14.0@compile as already imported io.micrometer:micrometer-observation-test:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM. @ org.springframework.boot:spring-boot-dependencies:3.4.0
[WARNING] Ignored POM import for: io.micrometer:micrometer-registry-appoptics:jar:1.14.0@compile as already imported io.micrometer:micrometer-registry-appoptics:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM. @ org.springframework.boot:spring-boot-dependencies:3.4.0
[WARNING] Ignored POM import for: io.micrometer:micrometer-registry-atlas:jar:1.14.0@compile as already imported io.micrometer:micrometer-registry-atlas:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM. @ org.springframework.boot:spring-boot-dependencies:3.4.0
[WARNING] Ignored POM import for: io.micrometer:micrometer-registry-azure-monitor:jar:1.14.0@compile as already imported io.micrometer:micrometer-registry-azure-monitor:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM. @ org.springframework.boot:spring-boot-dependencies:3.4.0
[WARNING] Ignored POM import for: io.micrometer:micrometer-registry-cloudwatch2:jar:1.14.0@compile as already imported io.micrometer:micrometer-registry-cloudwatch2:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM. @ org.springframework.boot:spring-boot-dependencies:3.4.0
[WARNING] Ignored POM import for: io.micrometer:micrometer-registry-datadog:jar:1.14.0@compile as already imported io.micrometer:micrometer-registry-datadog:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM. @ org.springframework.boot:spring-boot-dependencies:3.4.0
[WARNING] Ignored POM import for: io.micrometer:micrometer-registry-dynatrace:jar:1.14.0@compile as already imported io.micrometer:micrometer-registry-dynatrace:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM. @ org.springframework.boot:spring-boot-dependencies:3.4.0
[WARNING] Ignored POM import for: io.micrometer:micrometer-registry-elastic:jar:1.14.0@compile as already imported io.micrometer:micrometer-registry-elastic:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM. @ org.springframework.boot:spring-boot-dependencies:3.4.0
[WARNING] Ignored POM import for: io.micrometer:micrometer-registry-ganglia:jar:1.14.0@compile as already imported io.micrometer:micrometer-registry-ganglia:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM. @ org.springframework.boot:spring-boot-dependencies:3.4.0
[WARNING] Ignored POM import for: io.micrometer:micrometer-registry-graphite:jar:1.14.0@compile as already imported io.micrometer:micrometer-registry-graphite:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM. @ org.springframework.boot:spring-boot-dependencies:3.4.0
[WARNING] Ignored POM import for: io.micrometer:micrometer-registry-health:jar:1.14.0@compile as already imported io.micrometer:micrometer-registry-health:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM. @ org.springframework.boot:spring-boot-dependencies:3.4.0
[WARNING] Ignored POM import for: io.micrometer:micrometer-registry-humio:jar:1.14.0@compile as already imported io.micrometer:micrometer-registry-humio:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM. @ org.springframework.boot:spring-boot-dependencies:3.4.0
[WARNING] Ignored POM import for: io.micrometer:micrometer-registry-influx:jar:1.14.0@compile as already imported io.micrometer:micrometer-registry-influx:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM. @ org.springframework.boot:spring-boot-dependencies:3.4.0
[WARNING] Ignored POM import for: io.micrometer:micrometer-registry-jmx:jar:1.14.0@compile as already imported io.micrometer:micrometer-registry-jmx:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM. @ org.springframework.boot:spring-boot-dependencies:3.4.0
[WARNING] Ignored POM import for: io.micrometer:micrometer-registry-kairos:jar:1.14.0@compile as already imported io.micrometer:micrometer-registry-kairos:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM. @ org.springframework.boot:spring-boot-dependencies:3.4.0
[WARNING] Ignored POM import for: io.micrometer:micrometer-registry-new-relic:jar:1.14.0@compile as already imported io.micrometer:micrometer-registry-new-relic:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM. @ org.springframework.boot:spring-boot-dependencies:3.4.0
[WARNING] Ignored POM import for: io.micrometer:micrometer-registry-opentsdb:jar:1.14.0@compile as already imported io.micrometer:micrometer-registry-opentsdb:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM. @ org.springframework.boot:spring-boot-dependencies:3.4.0
[WARNING] Ignored POM import for: io.micrometer:micrometer-registry-otlp:jar:1.14.0@compile as already imported io.micrometer:micrometer-registry-otlp:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM. @ org.springframework.boot:spring-boot-dependencies:3.4.0
[WARNING] Ignored POM import for: io.micrometer:micrometer-registry-prometheus:jar:1.14.0@compile as already imported io.micrometer:micrometer-registry-prometheus:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM. @ org.springframework.boot:spring-boot-dependencies:3.4.0
[WARNING] Ignored POM import for: io.micrometer:micrometer-registry-prometheus-simpleclient:jar:1.14.0@compile as already imported io.micrometer:micrometer-registry-prometheus-simpleclient:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM. @ org.springframework.boot:spring-boot-dependencies:3.4.0
[WARNING] Ignored POM import for: io.micrometer:micrometer-registry-signalfx:jar:1.14.0@compile as already imported io.micrometer:micrometer-registry-signalfx:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM. @ org.springframework.boot:spring-boot-dependencies:3.4.0
[WARNING] Ignored POM import for: io.micrometer:micrometer-registry-statsd:jar:1.14.0@compile as already imported io.micrometer:micrometer-registry-statsd:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM. @ org.springframework.boot:spring-boot-dependencies:3.4.0
[WARNING] Ignored POM import for: io.micrometer:micrometer-registry-wavefront:jar:1.14.0@compile as already imported io.micrometer:micrometer-registry-wavefront:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM. @ org.springframework.boot:spring-boot-dependencies:3.4.0
[WARNING] Ignored POM import for: io.micrometer:micrometer-test:jar:1.14.0@compile as already imported io.micrometer:micrometer-test:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM. @ org.springframework.boot:spring-boot-dependencies:3.4.0
[WARNING] Ignored POM import for: org.apache.maven.plugin-tools:maven-plugin-annotations:jar:3.7.0@compile as already imported org.apache.maven.plugin-tools:maven-plugin-annotations:jar:3.13.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM. @ org.springframework.boot:spring-boot-dependencies:3.4.0
[WARNING] 
[WARNING] It is highly recommended to fix these problems because they threaten the stability of your build.
[WARNING] 
[WARNING] For this reason, future Maven versions might no longer support building such malformed projects.
[WARNING] 

I think that's because we import the micrometer-bom and the micrometer-tracing-bom, which in turn imports the micrometer-bom again.

Do we have to flatten (and deduplicate) the BOMs in our dependency management to get rid of the warnings?

[mhalbritter]

When I use our spring-boot-starter-parent as a parent, I get less warnings, but still some:

[WARNING] 
[WARNING] Some problems were encountered while building the effective model for 'my.group:lib:jar:1.0.0-SNAPSHOT'
[WARNING] Ignored POM import for: io.micrometer:micrometer-commons:jar:1.14.0@compile as already imported io.micrometer:micrometer-commons:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM.
[WARNING] Ignored POM import for: io.micrometer:micrometer-core:jar:1.14.0@compile as already imported io.micrometer:micrometer-core:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM.
[WARNING] Ignored POM import for: io.micrometer:micrometer-jakarta9:jar:1.14.0@compile as already imported io.micrometer:micrometer-jakarta9:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM.
[WARNING] Ignored POM import for: io.micrometer:micrometer-java11:jar:1.14.0@compile as already imported io.micrometer:micrometer-java11:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM.
[WARNING] Ignored POM import for: io.micrometer:micrometer-java21:jar:1.14.0@compile as already imported io.micrometer:micrometer-java21:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM.
[WARNING] Ignored POM import for: io.micrometer:micrometer-jetty11:jar:1.14.0@compile as already imported io.micrometer:micrometer-jetty11:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM.
[WARNING] Ignored POM import for: io.micrometer:micrometer-jetty12:jar:1.14.0@compile as already imported io.micrometer:micrometer-jetty12:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM.
[WARNING] Ignored POM import for: io.micrometer:micrometer-observation:jar:1.14.0@compile as already imported io.micrometer:micrometer-observation:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM.
[WARNING] Ignored POM import for: io.micrometer:micrometer-observation-test:jar:1.14.0@compile as already imported io.micrometer:micrometer-observation-test:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM.
[WARNING] Ignored POM import for: io.micrometer:micrometer-registry-appoptics:jar:1.14.0@compile as already imported io.micrometer:micrometer-registry-appoptics:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM.
[WARNING] Ignored POM import for: io.micrometer:micrometer-registry-atlas:jar:1.14.0@compile as already imported io.micrometer:micrometer-registry-atlas:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM.
[WARNING] Ignored POM import for: io.micrometer:micrometer-registry-azure-monitor:jar:1.14.0@compile as already imported io.micrometer:micrometer-registry-azure-monitor:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM.
[WARNING] Ignored POM import for: io.micrometer:micrometer-registry-cloudwatch2:jar:1.14.0@compile as already imported io.micrometer:micrometer-registry-cloudwatch2:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM.
[WARNING] Ignored POM import for: io.micrometer:micrometer-registry-datadog:jar:1.14.0@compile as already imported io.micrometer:micrometer-registry-datadog:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM.
[WARNING] Ignored POM import for: io.micrometer:micrometer-registry-dynatrace:jar:1.14.0@compile as already imported io.micrometer:micrometer-registry-dynatrace:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM.
[WARNING] Ignored POM import for: io.micrometer:micrometer-registry-elastic:jar:1.14.0@compile as already imported io.micrometer:micrometer-registry-elastic:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM.
[WARNING] Ignored POM import for: io.micrometer:micrometer-registry-ganglia:jar:1.14.0@compile as already imported io.micrometer:micrometer-registry-ganglia:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM.
[WARNING] Ignored POM import for: io.micrometer:micrometer-registry-graphite:jar:1.14.0@compile as already imported io.micrometer:micrometer-registry-graphite:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM.
[WARNING] Ignored POM import for: io.micrometer:micrometer-registry-health:jar:1.14.0@compile as already imported io.micrometer:micrometer-registry-health:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM.
[WARNING] Ignored POM import for: io.micrometer:micrometer-registry-humio:jar:1.14.0@compile as already imported io.micrometer:micrometer-registry-humio:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM.
[WARNING] Ignored POM import for: io.micrometer:micrometer-registry-influx:jar:1.14.0@compile as already imported io.micrometer:micrometer-registry-influx:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM.
[WARNING] Ignored POM import for: io.micrometer:micrometer-registry-jmx:jar:1.14.0@compile as already imported io.micrometer:micrometer-registry-jmx:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM.
[WARNING] Ignored POM import for: io.micrometer:micrometer-registry-kairos:jar:1.14.0@compile as already imported io.micrometer:micrometer-registry-kairos:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM.
[WARNING] Ignored POM import for: io.micrometer:micrometer-registry-new-relic:jar:1.14.0@compile as already imported io.micrometer:micrometer-registry-new-relic:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM.
[WARNING] Ignored POM import for: io.micrometer:micrometer-registry-opentsdb:jar:1.14.0@compile as already imported io.micrometer:micrometer-registry-opentsdb:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM.
[WARNING] Ignored POM import for: io.micrometer:micrometer-registry-otlp:jar:1.14.0@compile as already imported io.micrometer:micrometer-registry-otlp:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM.
[WARNING] Ignored POM import for: io.micrometer:micrometer-registry-prometheus:jar:1.14.0@compile as already imported io.micrometer:micrometer-registry-prometheus:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM.
[WARNING] Ignored POM import for: io.micrometer:micrometer-registry-prometheus-simpleclient:jar:1.14.0@compile as already imported io.micrometer:micrometer-registry-prometheus-simpleclient:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM.
[WARNING] Ignored POM import for: io.micrometer:micrometer-registry-signalfx:jar:1.14.0@compile as already imported io.micrometer:micrometer-registry-signalfx:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM.
[WARNING] Ignored POM import for: io.micrometer:micrometer-registry-statsd:jar:1.14.0@compile as already imported io.micrometer:micrometer-registry-statsd:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM.
[WARNING] Ignored POM import for: io.micrometer:micrometer-registry-wavefront:jar:1.14.0@compile as already imported io.micrometer:micrometer-registry-wavefront:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM.
[WARNING] Ignored POM import for: io.micrometer:micrometer-test:jar:1.14.0@compile as already imported io.micrometer:micrometer-test:jar:1.14.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM.
[WARNING] Ignored POM import for: org.apache.maven.plugin-tools:maven-plugin-annotations:jar:3.7.0@compile as already imported org.apache.maven.plugin-tools:maven-plugin-annotations:jar:3.13.1@compile. Add the conflicting managed dependency directly to the dependencyManagement section of the POM.
[WARNING] 
[WARNING] It is highly recommended to fix these problems because they threaten the stability of your build.
[WARNING] 
[WARNING] For this reason, future Maven versions might no longer support building such malformed projects.
[WARNING]

[mhalbritter]

Same with

Apache Maven 4.0.0-rc-2 (273314404f85ec3c089e295d8b4e0cb18c287cf5)

[wilkinsona]

Other than the problem with org.apache.maven.plugin-tools:maven-plugin-annotations, I think this should be fixed in Micrometer. IMO, the Micrometer Tracing bom shouldn't import the Micrometer bom as the latter is released separately to the former.

The maven-plugin-annotations part of the problem is covered by #42522, although the root cause is multiple third-party boms that we import managing something that they should not be managing.