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Vote too old to be changed, unless post is edited “problem”

By mistake I downvoted good answer that was upvoted by me earlier. Now I cannot upvote it again because the answer is too old. I asked answer author to edit his answer and then was able to upvote it again.

Is there other way to repair such mistake?

I think SO should allow me to change my decision within some time, but maybe I omitted something.

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migrated from Oct 23 '09 at 10:54

This question came from our site for professional and enthusiast programmers.

marked as duplicate by Ladybug Killer, random, ChrisF, BinaryMisfit Oct 23 '09 at 11:46

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

Hi. Questions about stackoverflow belong at – Tinister Oct 23 '09 at 10:51
I've seen this problem too. This should be moved to meta and hopefully the SO development team will do something with it. – sharptooth Oct 23 '09 at 10:52

It's designed to prevent people gaming the system - particularly downvoting other answers on questions they've upvoted. See this related question.

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