Solution : https://service.sap.com/sap/support/notes/402484 (SAP Service marketplace login required)
Key words :
order <order number> item <item number>, additional key words transaction, message /sapapo/sales 602 'mapping, /3 system main items, /sapapo/bop_updatebackorder processing, /sapapo/bop, backorder processing, confirmed quantity, qrfcs remain, problem occurs
Related Notes :
441932 | Updating: Mapping for order incorrect |
375193 | Backorder processing: Composite SAP note on posting |