Any way to cancel the GI reversal generated by VL09

I have a delivery, accidentally performed GI at the end of the month, 30.11.2009.

However, reversal is done at the beginning of next month, 01.12.2009 (It should be reversed as of 30.11.2009)

So is it possible to reverse the reversal document generated on 01.12.2009?

Thanks.