SAP Message BON_ENH_MESS202 - Agreement type &1: source structure &3 is not allowed DOCUMENTATION DiagnosisThe target structure &V3& for agreement type &V1&, counter &V2&, is notconsidered for updating the variable key.ProcedurePlease use one of the following communication structures:MCKONVMCVBRKMCVBRPMCVBPAMCVBUKMCVBUP