SAP Message AC654 - Tab layout &1 cannot be deleted, since it is assigned to asset class &2

Diagnosis Tab layout &V1& cannot be deleted, since it is assigned to at least oneasset class (asset class &V2&). System Response Layout &V1& is not deleted. Procedure If you want to delete tab layout &V1&, you first have to remove theassignment to the asset class, using transaction Assignlayouts to asset classes.