Solution : https://service.sap.com/sap/support/notes/307848 (SAP Service marketplace login required)
Key words : 
additional key words productiion version, prerequisites solution implement, attached program change, production version determined, production version, automatic creation, purchase order, purchase requisition, transaction me59, system generates
Related Notes : 
       
| 398668 | ME21N no dialog box for different production versions |