Error in inspection lot quantity due to material document cancellation

Hi Gurus,

This is the situation:

1) GR against process order

2) Automatic Inspection Lot generation due to material config. 1 per batch. Origin 04. Stock in quality.

3) MBST of GR in step 1 (wrong process order)

4) GR against another process order (this time the correct one). No IL generated.

5) Stock error while giving Usage Decision (QA11) to IL.

6) By displaying material movements in the IL (QA03), it also shows the cancelled one.

I can't cancel the origin 04 IL.

How can I cleanly revert this so that IL has the correct material movement assigned?

Thanks!

Martin