I recently flagged a post as a duplicate before reading the entirely of the post that I indicated was the original question (yeah, I know, bad Shaun). After reading, however, I realized the original question was just a subset of the new question and that the new question deserved to be asked. However, I saw no method via which I could reverse my hasty action. I could try to flag it again, it seems, but not un-flag it.
Is this possible, or should I just treat this as a learning experience and "slow my roll" next time?