Document Complete Check Before Approve Subprocess (Change Order)

Dear Friends,

I have a scenario where PO is Cancelled at Header level but the PO is still in "In Process" status.

Here is my analysis so far:

I have checked the workflow status diagram for the item key of this PO.

In the diagram, the workflow initially sets the PO status to "In Process" and then after few validations, it entered Approve PO (Change Order) process.

In this parent process, it is failing at the sub process:- Document Complete Check Before Approve Subprocess (Change Order).

Based on this i understand that Document is not complete and some of the validations are failing.