Canceling Completion Confirmations 
Use
It is possible to cancel data previously confirmed.
What can you Cancel?
Every completion confirmation entered in the system can be canceled. Thus, if you entered three confirmations for a phase, you can also cancel three confirmations and all confirmations automatically created by them.

You also activate user stati (depending on the reason for the malfunction) when confirming a phase. The stati are not automatically canceled when you cancel the confirmation.
You can also access this function from within a PI sheet. See also
:
Canceling Order Confirmations.