SAP Message WY156 - Partner function &1 cannot be used by vendors in account group &2

Diagnosis Partner function &V1& is assigned to your vendor at level &V3&. Thisfunction is entered by the vendor. However, this partner function is not allowed for vendors in accountgroup &V2& which is to be assigned. System Response A change of account group is not permitted. Procedure Please change the partner functions for the account group inCustomizing.