I answered a question in a rush recently. For good or bad, the answer received a downvote quickly. I deleted the answer soon thereafter... but kept thinking about the question during the weekend.
Now I am at a point where I could write up a new answer - completely different content compared to what I wrote initially.
Is it legit to simply write up a new answer? Is it "mandatory" to un-delete that first answer, hoping that the downvoter (or somebody else) happens to come by and see the changed content?
For the record: I wrote up that new answer by now over here ... so decide for yourself if that answer is really "new" or should have better been a rewrite of the earlier attempt.