Solution : https://service.sap.com/sap/support/notes/317451 (SAP Service marketplace login required)
Key words : 
additional key words kdauf, sales order account assignment, post credit memos, -party order processing, vendor credit memo, symptom sd symptom, attached correction instructions, sales order, purchase order, mm symptom
Related Notes : 
       
| 379527 | |
| 333221 | Third-party: VPRS incorrect for partial invoices | 
| 312891 | Third party: profit center doc missing and VPRS incor |