What causes this issue?

During the conversion of the record, it comes to a merge in the
database. That means, there are two records with the same primary key
values and one of them should be deleted. In order to decide which
record should be deleted, there are defined at least two priority
routines . The priority routines provide different results in regard to
this.

System Response

No priority will be used for the record. Namely, the record will be
deleted from the database.

How to fix this error?

Check the original values of the record in log and the related messages
to see the results of each priority routine. Contact SAP for support in
case that errors occur related to this bevaviour.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.