Change posting date on Reverse Entry for Payment

Scenario:

I entered an outgoing payment cheque run > printed cheques > posting date 31.05.09

Now i want to cancel this cheque run, so i voided the cheques.(under banking > ougoing payments > void checks for payment). I entered today as the posting date. This was incorrect. I should have entered posting date 31.05.09.

Can i now change the posting date to 31.05.09 on the reverse journal entry?