In FSW, when trying to debrief a part that has Non Source IB Subtransaction it errors out

Hi Team... I have the following problem.

Created a Service Activity code and its related IB Subtransaction. The Subtransaction requires for a Non Source reference.

Create SR, dispatch task and assign to FS Tech.

FS Tech logs into Field Service Wireless... selects task and debriefs it. When entering the USAGE item (from the Tech's subinventory) I add the item, select the Business Process, Service Activity Code (the one that requires non source information) and the parent information is automatically populated.

Now, the recovered part info is left blank and I remove the Parent information but I don't see any place to call for the reference item. I have tried filling the Recovered part and clear the Parent info but when I submit the debrief line an error prevents it and says the Non Source Reference Not Found.