This forum is to discuss different features/issues of Oracle Financials modules ( GL - General Ledger, AP - Accounts Payable, AR - Accounts Receivable, FA - Fixed Assets & CM - Cash Management ).
If you have done 'Final' or 'Final Post' accounting, then you will not be able to rollback the accounting entries.
Either you need to create the reversal entries in AR and then create the transactions with correct accounts or you need to enter the adjustment journals in GL.