I have created one ALV report and using the information selected here I call BAPI_PR_CHANGE in order to mark for deletion one existing item and to add a second item in the PReq. The material that I want to add has mara-mstae set as locked for acquisition. But the PReq has supplying plant (no vendor) and item category transfer stock. This means the item is not purchased from the vendor but is transferred inside the company - from my point of view the status settled in the material should not determine the message ME 053.
It is something that I'm missing? Could I skip this error or could I do different settings in OMS4?