Can a closed work order be opened again and same as well with OSP Purchase Order?

Summary:

Scenario.

A work order had been closed. This work order is undercompleted because its OSP PO was not yet fully received in full. After the Work Order had been closed, the OSP PO is cancelled automatically. In the additional information of the OSP PO document history, there is a note of SCO Change.

Wondering why the system behave this way, why a OSP PO had been cancelled even there was a receipting happened to it.

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