Business Area in MB51 via BAPI_GOODSMVT_CREATE

Hi

I am using BAPI_GOODSMVT_CREATE to create material document.

When the BAPI is finished, the document is created, but I also have a Business Area in my material document.
When I create the BAPI I dont fill any Business Area, but it is mentioned in the document anyway

Is there any logic behind, so when I use a specific G/L account, then I will get a specific Business Area?

Anybody who can help me, so I don't see the business area?

Thanks