Internal Order Rejection TO be sent to Vendor

Hi Friends,

We had received a material against defined internal order and material type is UNBW, which is consumed via MIGO process immediately.

Now the material is rejected by user and to be sent back to vendor for this stock must be created in system.

But the stock is not showing as the same is consumed on internal order.

For this we had tried to cancel the MIGO number for reversal but system is showing error message as "Deficit of PU IR quantity 10.000 NO".

Kindly suggest the resolution point.

Thanks