Merge: Define Surivorship for CustomObjects

Summary:

Dear all,

we merge accounts. For accounts we do have a m:n relationship to a custom object. With a merge all custom objects would be linked to the survivor. This violates an uniqueness constraint (an account is linked two times to the same custom object) and prevents the successfull merge. The uniqueness constrain was introduced with 23B I think. Is there a possibility to define survivorship rules for custom objects like for attributes?

Best regards

Michael