Closing Inbound Delivery with partial quantity

I search a lot of ways to do this, and found nothing. It should be a pretty straight forward business requirement, yet...

I'm using PO confirmation with inbound delivery which the supplier sends, and then I receive the goods in a WM managed warehouse.

The supplier sends a ASN with 10 CRT, but when unloading the truck we detect only 9 CRT. In OT confirmation I count 9, and post the difference to 902 which update the warehouse quantity to 9 CRT in the inbound delivery, and makes a partial GR for the 9 CRT to clear 902.

All is fine here, the system is working just as I want, since I want to keep the 10 CRT the supplier sent in the ASN document for auditing purposes, the problem is I can't seem to close this delivery. The supplier isn't going to send anymore, I want to keep this inbound delivery with the original quantities so I know the supplier failed to deliver what was promised in the ASN.

Changing delivery Qtd is not what I want. I want to keep the original data sent by the supplier in the ASN (it doesn't make business sense to change a document changed by an external entity).

Is there a way to do this? I just want to close the document.