postgresql configuration update fails

[yupwei68]

First we get a configuration for postgresql:
Get https://management.azure.com/subscriptions/.../resourceGroups/post-yup/providers/Microsoft.DBforPostgreSQL/servers/post-yup/configurations/azure.replication_support?api-version=2017-12-01:

{"properties":{"value":"logical","description":"Sets the level of replication support (Read Replicas). Any change requires restarting the server to take effect.","defaultValue":"OFF","dataType":"Enumeration","allowedValues":"OFF,REPLICA,LOGICAL","source":"user-override","isConfigPendingRestart":"False","isDynamicConfig":"False"},"id":"/subscriptions/.../resourceGroups/post-yup/providers/Microsoft.DBforPostgreSQL/servers/post-yup/configurations/azure.replication_support","name":"azure.replication_support","type":"Microsoft.DBforPostgreSQL/servers/configurations"}

Then we update the configuration with value "OFF", then we get:
PUT /subscriptions/.../resourceGroups/post-yup/providers/Microsoft.DBforPostgreSQL/servers/post-yup/configurations/azure.replication_support?api-version=2017-12-01

{"properties":{"value":"OFF"}}

{"name":"...","status":"Failed","startTime":"2020-07-06T07:33:58.397Z","error":{"code":"InvalidConfigurationValue","message":"The value 'OFF' for configuration 'azure.replication_support' is not valid. The allowed values are 'REPLICA,LOGICAL'."}}

Thanks for the feedback! We are routing this to the appropriate team for follow-up. cc @rachel-msft.

[ArcturusZhang]

Swagger file link:

azure-rest-api-specs/specification/postgresql/resource-manager/Microsoft.DBforPostgreSQL/stable/2017-12-01/postgresql.json

Line 908 in cf34791

"/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.DBforPostgreSQL/servers/{serverName}/configurations/{configurationName}": {