Trial Balance CREDIT amount column figures differ from actual data

Hi,
First of all we are using AX 2012 R3. In the Trial balance for a particular account, in current year, the CREDIT column shows 100.00 but once you click the hyper link for credit column and export the data to Excel, total it up, we get 90.
I know the reason. For a particular voucher, we had changed the amount manually by modifying the record in the relevant tables.
How to fix this?

regards
Thomas Philipose