Buyer PO Cancellation - PO status is Open

Summary:

Buyer entered a PO Cancellation Change Order on an open PO. The Change Order was approved, but the PO status is still 'Open'.

Content (required):

Buyer entered a PO Cancellation Change Order on an open PO. The Change Order was processed, but the amount changed was $0. The PO status remains Open. The buyer attempted to cancel multiple times and each time the same result occurred.

What might cause this situation to occur? We haven't experienced this before and other buyer cancellations processed on the same day were successful.

Version (include the version you are using, if applicable):

23B

Code Snippet (add any code snippets that support your topic, if applicable):