Diagnosis
In the master data catalog, you tried to delete an object for whichsuperior objects exist. However, you could not delete the relationshipsto these objects.
There can be several reasons why this happened:
the superior object is currently locked by another user
you do not have authorization to change the superior object

System Response
The system cancels the "Delete" function.

Procedure
It is likely that another user is currently changing the superiorobject. For this reason, try to perform the function again after ashort time.