SAP Message /SAPHT/DRM01083 - Correct partner reported but mapping missing for Distributor's partner.

Diagnosis Distributor has reported internal partner as &SYST-MSGV1& which existsin the system. However, in the external to internal partner mapping(transaction /SAPHT/DRM_C10) no mapping exists for Distributor'spartner &SYST-MSGV2& and tracking partner &SYST-MSGV3&. Procedure Update external to internal mapping with internal partner asSyst-msgv1 for external partner syst-msgv2 and tracking partnerSyst-msgv3.