Issue for posting of invoice

Hi Experts,

Help me to resolve this issue.

We have the issue for posting of invoice in AR Module. The details are as below

 Location - Unit II

 Product Code: 794 Problem with this item only.

 Daily production report and other reports the stock is showing 80,000 Nos but in hand (Physical inventory) stock in the inventory is showing 77,700 Nos.

 The actual stock is 80,000 hence we are unable to posting the invoice.

 Please help me to resolve this issue.

Thanks in advance and regards,