Solution : https://service.sap.com/sap/support/notes/89082 (SAP Service marketplace login required)
Key words :
additional key words confirmed quantity, attached source code correction, individual customer purchase orders, partially delivered sales order, individual customer order, partially referenced quotation, availability control screen, confirmed quantity, delivered quantity, deliver partially
Related Notes :
154935 | Error for conf. qties in deliv.schedule maintennc |
66451 | Incorrect confirm. qty after quotation change |