Solution : https://service.sap.com/sap/support/notes/379816 (SAP Service marketplace login required)
Key words :
additional key words delete item, optional import parameter mode_insert, import parameter int_number_assignment, text types existed, distribution document item, function module create_text, internal number assignment, function module bapi_salesorder_change, import parameter, item number
Related Notes :
| 390465 | BAPI SD: Document creation - texts and incompleteness |