Solution : https://service.sap.com/sap/support/notes/1062164 (SAP Service marketplace login required)
Key words :
terms message m7 838 reason, add export parameter allow_existing_batch, interfaceof function module vb_next_batch_number, user exit exit_saplv01z_002, triggers exception batch_exist, existing batch number, replacing modification note 523589, module vb_create_batch, existing batch', existence check
Related Notes :
| 1248511 | Differences between storage location stock and batch stock |