Suppose I post an answer that gets a few upvotes and a few downvotes. Then I find the answer is totally wrong so I delete it.
The next day I see a correct solution to the problem. My impression is that officially I'm supposed to edit and undelete the previous answer instead of posting a new answer.
Q. Is that in fact the policy?
Q: Does this make sense? What bothers me is I'm attaching votes on the previous answer to the current version, which is simply not at all what the voters voted for.