Solution : https://service.sap.com/sap/support/notes/127177 (SAP Service marketplace login required)
Key words :
movement indicator kzbew = 'b', additional key words mb_create_goods_movement, correct purchase order data, symptom goods movements, idoc interface wmmbxy, transaction / posting run, function module mb_create_goods_movement, purchase order number, purchase order, function module
Related Notes :
| 142364 | AFS IDOC: WMMBXY - Posted to incorrect PO item |