Hi Abhishek,
If I understand your issue correctly then this seems to be a cut-over issue. What I can suggest is that:
1. Close all outstanding orders that are account assigned to the CAPEX Internal orders.
2. Based on the Finance decision, AuCs are to be scraped or capitalized and then scraped.
3. Create / upload Projects and their WBS elements in the system.
4. Create AuCs for WBS elements (as per Investment profile settings).
5. Create all orders (PR / PO / GR / IR / Service order) with the same amount and stage of processing, and with account assignment to WBS elements.
6. Settle the WBS elements to respective AuC.
Hope this helps.
Best regards,
Aditya