Wrong PO number displaying in check printing (FBZ5)

Dear all,

In FBZ5, check printing, we are getting the wrong PO no in the check.

Remaining all document nos and amount is displaying correctly.

With reference to the PO we are created the invoice receipt and saved perfectly.

But in check printing it is taking some other PO no,

Kindly suggest on this,,,urgent plz

Regards

Manu