Requester & Procurement BU Account Issue

Requester belongs to Business Unit (Sector -06-Maritime & Logistics Academy) and Procurement BU is (Sector-05-Corporate), PO created and based on the TAD Setup Charge, Accrual & Variance Account is taken place. The issue is: Finance team creates invoices matching to these PO's. But when the invoice is accounted, the Requestor BU is also taken into account and hence the system does not account the invoices. Please note that the BU is a Secondary Balancing Segment. We are having this issue in the Production instance only. Test instance works fine. Kindly let us know what setups we are missing in the