Solution : https://service.sap.com/sap/support/notes/74083 (SAP Service marketplace login required)
Key words :
import parameter reference fieldi_objnr onr00-objnractivate function module, additional key words cobra, delete sales order items, function module 'rv_co_object_delete', activate function module, function group v45u, development class 'va', import parameter, generate program sapfv45p, deleted item number
Related Notes :
| 124437 | Status object is missing in the sales order |
| 82435 | Status object is not deleted from sales order |
| 52546 | Status object does not exist in the sales order |
| 14097 | Order item cannot be deleted/overwritten |