Reversing Ad Hoc Completion

From time to time it is discovered that an Ad Hoc completion was incorrect, for example, the wrong item was completed.

As long as the accounting hasn't run it is easy to reverse the transaction take the parent out of inventory and increment the component inventory. However, if the accounting has run the transaction is no longer accessible in the PF31014 to perform the reversal.

Get a hard error when trying to perform a negative Ad Hoc completion to reverse.

Get a hard error when trying to perform a negative discrete work order transaction to reverse.

How would you suggest correcting the error short of inventory adjustments for the parent and all of the components.