Discard invoice line shows in Accounts Payable Trial Balance Report

Hi,

Please help us in this issue

1 - There is an invoice number 33 .

2 - The invoice Gl date header is 31-Aug-15.

3 - The invoice line Gl date lined is 29-Jun-2015.

4 - User has discarded the above line.

5 - User submitted Create accounting and transfer to GL.

6 - User submitted Accounts Payable Trial Balance and shows the invoice 33 with minus amount.

Thanks to check the attached files.

George