In the alarm rules, we have entered Prometheus metrics. The metric values show the converted results of the units. How can we display the original values?

[maa-echo]

Question and Steps to reproduce

有没有大佬，指导一下！！！告警规则那里的表达式填上以后，点数据预览，显示的指标值是单位转换后的，我这原始指标值是时间戳
Just like this, the original value was originally a timestamp. What should I do to display the original timestamp?

The following picture shows the original values, which are the timestamps.这部分的数据是在指标那里看的，然后我改成了none，就是显示原始值了

Relevant logs and configurations

In the alarm rules, we have entered Prometheus metrics. The metric values show the converted results of the units. How can we display the original values?

Version

v8.4.1