How to unvoid SOP Sales Return Document in GP 8.0

I had wrongly made a Sales Return in GP 8.0 but had not posted it. To avoid any effect , I voided the document. Now my SOP Inventory Sales Report from GP 8.0 shows additional amount which is the difference of this return.

How can I rectify this error through SQL script or from with GP 8.0.

I need to rectify this error so as to generate my month end report.

Thanks

Ashok