&3 &1 could not be deleted

What causes this issue?

You attempted to delete the object &V3& &V1& from plan version &V2&.
The system cannot currently delete the object from the database.

System Response

When RH_DELETE_OBJECT was called, an exception was triggered. No data
was deleted from the database.

How to fix this error?

Try to delete the data later.

Error message extract from SAP system. Copyright SAP SE.