Assume someone asks a question, I read it and think "ok I've got it". And post my answer. After some amount of time I realize, or am alerted that my answer is wrong. Perhaps it was too sloppy, or missed a special case, or even maybe I misunderstood the question. Also assume that in the mean time, someone else has answered the question correctly. Their answer has been accepted and all is well.
Should I delete my answer?
I don't think this matter is super important, I was just curious.