3189190 - Error ME020 “Item category U not allowed with document type” for Intra STO

You create an intra-company-code stock transfer with supplying plant and valuated stock in transit via transaction ME21N (Create Purchase Order).

An error is raised:

E ME020 "Item category U not allowed with document type"
or
E MEPO178 "Item category U not supported for Purchase Order document type n in SIT"

Materials Management (MM)
SAP ERP
SAP enhancement package for SAP ERP
SAP enhancement package for SAP ERP, version for SAP HANA
SAP S/4HANA

ME020, MEPO178, MIGO, ME21N, Stock, transport, STO, intra, purchase, order, valuated. goods, receipt, GR , KBA , MM-PUR-GF-STO , Stock Transfer , Problem