Solution : https://service.sap.com/sap/support/notes/503910 (SAP Service marketplace login required)
Key words :
similar system response, function module bapi_po_create1, function modules bapi_po_create1, existing purchase order, function module bapi_po_change, support package sapkh46c33, purchase order, support package 18, default data, interface data
Related Notes :
| 494759 | BAPI_PO_CREATE1 and BAPI_PO_CHANGE: This is due to a redesig |
| 458959 | BAPI_PO_CHANGE changes non change-relevant items |
| 431530 | WWP1/BAPI_PO_CHANGE:Deleting full prodct not dleting empties |