Solution : https://service.sap.com/sap/support/notes/65331 (SAP Service marketplace login required)
Key words :
additional key words einzelfertigung_pruefen, existing sales document, message number v1006, attached advance corrections, delete items, program error, prerequisites
Related Notes :
| 68956 | ILLEGAL_TEMPORARY_OBJNR when saving |
| 14097 | Order item cannot be deleted/overwritten |