VBOF - Not updating the Tables

Hi,

I am working on an issue and need your help.

We used VBOF to update the old billing documents with rebated conditions created in a rebate agreement. The billing documents are updated properly but VBOF did not update VBRK table with rebate agreement# (VBRK-KNUMA). Is it because the billing document was already created before and VBOF just updates the billing documents and not the tables behind it?

Also, i checked KONV table for the updated rebate condition records and i could not find them.

VBRK-KNUMA is an important field for us in our custom report to view the settlement data and create credit memos. May i know if there is a way to update the VBRK table with the agreement numbers?

Thanks

Venkat