Change the inspection stock of material in QM only:Message no. QA495

Dear Gurus,

We are trying to reverse a purchase order.for which MIGO has be done.

let me explain in detail.

In our case material  was purchased and migo was done then material went into quality lot and was then posted into unrestricted  but the posting was done wrongly so now its has to be revsered.

I followed the following procedure

1)First step:Maintained 08 inspection type in Material Master

2)2nd Step:Reversed the stock from unrestricted to Quality via movement type 322.

3)3rd Step: I tried to reverse the Purchase order via T.code MB01 and movement type 102,Now got above error.

can do the reversal through MBST t.code

Please let me know if the above procedure done me right and where i am going wrong.

Thanks in advance

Regards

Ram