Solution : https://service.sap.com/sap/support/notes/493940 (SAP Service marketplace login required)
Key words :
delete delivery reason, deleting delivery items, type 'a' message, billing documents exist, billing status 'a', assigned billing documents, prevent delivery items, outbound delivery completely, delivery dialog, delivery processing
Related Notes :
| 550349 | Deletion of delivery items for cancelled billing documents |
| 415716 | User exits in delivery processing |
| 406693 | Inconsistent document flow if a delivery is deleted |