Metrics - remove connection

Hi everyone,

I've created a few metrics with both current and milestone value tied to a measure inside a report. After some days seeing the user's experience, we decided we would manually enter the milestone value, removing the connection on the milestone/target value.

However, there is no option to remove the connection.

Am I missing something, or does Power BI pretends that I recreate the metric ?

Thanks for any assistance you can provide