This question already has an answer here:
Currently I met with an issue in Stack Overflow.
I gave answer to this question: enable Assertions in objective c . As a quick answer I only added some-links and I was editing my answer, at that time my answer was deleted and added as a comment to the question.
I know that happened because that was a link only answer. But what happened is, when I tried to cast the undelete vote, it says moderator is deleted that post, So I can't undelete.
I read in faqs that the deleted answers can be undelete by casting the undelete votes and once a post has 3 undelete votes, it will no longer be deleted.
Then why that message popped for me, when I tried to cast my undelete vote ?
I added my edited answer again. It solved OP's issue and he accepted that.