Solution : https://service.sap.com/sap/support/notes/422042 (SAP Service marketplace login required)
Key words :
additional key words transactions, source code correction, field 'data type', product allocation assignment, product allocation procedure, product allocation procedures, structure /sapapo/qtusghead, enter /sapapo/qtusghead, choose 'add line', product allocation
Related Notes :
676128 | Product allocations: Product allocation assignment check |