In the general ledger, the total balance of the journal entries for the account do not equal the account's total balance shown in the Trial Balance. Data entry against the relevant account does not reconcile with the balance shown for the same account in the Trial Balance.
To fix this an unpost and repost of journal entries must be done.
Take a backup of the ledger before continuing.
Go to Data Entry, then select Unpost All Entries.
Go to Data Entry again and select Post Entries.
Select the correct Period Range - covering the whole current year and year of grace.
Select All Entry Types.
Then click on Post.
Once done, simply close the Post Entries box.
Run the trial balance and drill into the relevant accounts again.