Solution : https://service.sap.com/sap/support/notes/496557 (SAP Service marketplace login required)
Key words :
planned account assignments/unplanned account assignments distributed, account assignment line number, purchase order account assignments, planned account assignments, unplanned account assignments, purchase order account assignment, invoice account assignments, planned account assignment, account assignment unplanned, unplanned account assignment
Related Notes :
772206 | Commitment Update in Service Purchase Orders |
534241 | Transaction MIR7: Purchase order commitment is not reduced |
459509 | FAQ: Commitments in purchasing |