Solution : https://service.sap.com/sap/support/notes/204689 (SAP Service marketplace login required)
Key words :
account assignment category, account assignment, existing function, bapi_requisition_change bapi, terms preq, purchase requisition, xeban-afnam, eban-afnam, e1bpebanc-preq_name, eban-knttp
Related Notes :
| 499626 | FAQ: BAPIs in the service procurement |