This question already has an answer here:
I upvoted two answers (one on supersuser, the other on askubuntu), and downvoted other answers that said the contrary about the subject.
However, while experimenting, I found out that I was completely wrong, as were the answers that I upvoted.
I came back to undo my votes, but was too late; the 1 hour limit was reached.
Should I edit the answer myself to unlock my vote?
Is there a more legitimate option?