i would like to add non controlled attributes on a TAG who is Change Controlled

When adding non controlled attributes on a master TAG (who is change controlled) you are able to modify those specific attributes of that TAGs without creating a Prototype of it.

The problem is that when this same TAG is involved in several ECRs/ECPs than when merging back those attributes are overwritten...

Is there a solution that non controlled attributes on a master TAG are NOT overwritten by the Prototype values?