3448193 - Supplier does not exist error even after Key mapping

In your Fiori Sourcing Projects app, you would like to create Purchase Order in the Manage Supplier Quotation app. In spite a Key mapping has been maintained for the Supplier as per the configuration 4RD, the PO creation fails with the error "Supplier XYZ does not exist". 

• SAP S/4HANA
• SAP S/4HANA Cloud

Sourcing project, Supplier Quotation, Connected system, Hub system, Supplier does not exist, Key Mapping, MDG_KM_MAINTAIN, WY 026, Create Purchase Order, 4RD , KBA , MM-PUR-SRC-SSL , Sourcing Supplier List , MM-PUR-HUB-PO , Central Purchase Order , Problem