Suggestions:
If users have saved a expense voucher with incorrect supplier then users should again create an expense voucher with the voucher type as ‘Debit note’ and transaction type as ‘EXP’ enter the bill, date, supplier bill amount which needs to be reversed, due date, payable account, payable site code and then goto expense details tab and enter the expense details. In the account tab enter the account and cost center for which payment is to be reversed.
After this is entered, A new record can be created with the correct supplier.