Unable to cancel PO Line

 Hi Everyone,

When I want to cancel a PO line ... appear the following error message:

Error:Shipment #1 You cannot finally close this line because unprocessed receiving transactions exist.

The problem here is that we have some discrepancies in the information:

Quantity           Quantity Received         Quantity Accepted       Quantity Rejected      Quantity Billed    Quantity Cancelled            Quantity Due

   1               -.0000000005680908                   0                                     0                             0                           0                      .1328335945680908

Someone help us with any workarround in order to cancel this line??

Thanks,