Solution : https://service.sap.com/sap/support/notes/515019 (SAP Service marketplace login required)
Key words : 
cross-system stock transfer, terms stock transfer, source code correction, assigned release order, incorrect release order, sales order item, purchase order item, transfer material, release order, sales order
Related Notes : 
       
| 421200 | APO 3.1: Stock trans. of sev. R/3: req. source code change |