Can we able to reduce the stock item after issuing debit note and eway bill but before gstr3b ?

hi

Please help me to resolve this query:

We returned few items(purchase return) due to some issue and raised debit note and generated eway bill(delivery challan) including gst .

Now after verification from receiver , few items were found not received and hence i need to reduce the stock items from the issued debit note. No Gst return filed for this since its a nov 2018 case.  can anybody help  me how to resolve this?

thanks in advance