How to get the quantity to zero?

Hi,

We have the stock valuation report for the stock location but there is nothing in this location, but the report says we have some units for two items. Somehow we need to correct this so that there is nothing there.

We have one item number and the problem is that we haven't received an invoice to go against it. However, we aren't going to receive and invoice for this.
Can anyone advise how to get the qty to zero?