Reversal of Material Document in next FY year

Hi,

For a PO, GR was done in the FY 2013-2014 but by mistake user cancelled the Material Document by giving posting date as 28.04.2014 which comes in a different financial year.

Because of this reason, for 31st of March 2014, we are not able close this case.

Please guide what can be done in this case.

Note: We need to do the GR and Invoicing in the FY 2013-2014 only.

Thanks and Regards

M P Vashishth