Back out the transaction.
 
Open the WO (set status to R). Run WO-I. At the date field, hit F2. Find the transaction in the list and select it. You'll be back at the WO-I screen. Hit Tab and you will be asked if you want to back out the transaction. Answer Yes. At this point you may fix the transaction by entering the correct info or you can close WO-I and go back to the transaction at a later date.