Solution : https://service.sap.com/sap/support/notes/88374 (SAP Service marketplace login required)
Key words : 
additional key words cor1, customer-specific message class, automatic batch number assignment, batch number automatically, automatic batch creation, batch number, order creation, production order, process order, order release
Related Notes : 
       
| 214366 | Double batch number in the case of batch to client | 
| 97544 | Process order: creating header batch | 
| 84547 | Production/process order: Create batch | 
| 77636 | Orders with deletion flag are relevant to MRP |