I have impaired an asset that was damaged and it has now been repaired. I know the revaluation proce

I have impaired an asset that was damaged and it has now been repaired. I know the revaluation process will reverse the impairment, but as that is some months away I consider I should be able to remove the impairment, but cannot see how to do that as the period it was originally posted in is closed, and my attempt at loading a negative impairment error'ed. Is there a standard approach to reversing an impairment entry where the reason for the impairment has now been removed?