QM UD change issue

Hello Expert!!

In QM retest lot is created and they have completed all the process and provide UD, but problem is when user made UD Sample consumption (inspection lot stock ) not created. Stock is available for that Batch and same storage location.

users complete the UD.After completion UD they re-check the lot and find out there is no stock added for sample.

Now how to cancel UD or reverse UD with note.

Please provide a guide line.