Solution : https://service.sap.com/sap/support/notes/184286 (SAP Service marketplace login required)
Key words :
additional key words me21, create message 8w285, contract quantities, 'compare' pushbutton, purchase order, purchase requisition, detailed explanation, source code, transferred, overwritten
Related Notes :
| 167572 | Changes in SKU-level of PO referring to PR |