WIP order completion

Hi

We are in E9.0 and consolidating 2 different companies together into existing company in E1. As part of this activity, we are converting the MFg work orders open and WIP orders. We have specific case for WIP order conversion. The IM transactions are done and R31802A (WIP) completed for them and IC transactions are pending for WIP orders. We are planning to update the B/P fields in F4801 with new company value and  then do the WO completion (IC) transactions for those WIP with new B/P values, since lot of WIP orders during the consolidation. We have few queries on