Link purchase order to material request retrospectively

For a larger order, we created a material request and then several purchase orders. Unfortunately, one of the purchase orders was not linked to the material request.

In the meantime, the order was delivered to us (stock entry), charged and paid. But when we now try to create a delivery note for our customer, the system complains that the item on stock cannot be delivered because it is reserved.

Clearly, the material request created this item reservation. So, the logical thing to do would be to tell the system somehow that this isolated purchase order was actually meant to be booked against the material request.

That does not seem possible, however. The only thing I can think of is to cancel the “wrong” purchase order and all subsequent documents and then redo them.

You’ll agree that’s quite a time consuming and error-prone process just to get the link working. Is there maybe an alternative I’m not seeing?