Solution : https://service.sap.com/sap/support/notes/503098 (SAP Service marketplace login required)
Key words :
message class 8w, create message 289, returns item, purchase order, data inconsistencies, afs material, standard material, terms me21, retpo reason, transaction se91
Related Notes :
| 1332367 | No error message issued while saving Return Purchase order |
| 501161 | Pricing error 268(8J) in returns order |