Hello,
As mentioned by Hualin, you could run report RFDKLI20 after changing credit management customizing in FD32 or OVA8.
If you have not changed anything except the risk category, RFDKLI20 is actually possible, but too large for this purpose.
If you only change the risk category, report RVKRED09 is sufficient.
So, I suggest executing RVKRED09(if you only changed risk category) first to reorganize the credit limit information.
Then executing RVKRED88/RVKRED77 to reorganize credit value for related credit account.
Best regards,
Crystal Lin