We have an issue where the customer has outstanding invoices (manually transferred from old account XXXXXX) but they're not being reflected on the credit exposure in BP. Invoice document type: AB due to transfer.

User has performed the steps required for Credit Rebuild:
UKM_COMMITTMENTS
UKM_TRANSFER_ITEMS (Liability update)

No. of records sent: 0
The credit exposure will be updated with the customer open items for the respective credit segment assigned. BSEG-KKBER is filled for FI open items but did not flow to BP-UKM000
Can you please advise on the potential reason behind the issue occurrence? This is affecting the expected behavior with "Special attention" flag.
Thanks,
VJ