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Possible Duplicate:
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.

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

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migrated from stackoverflow.com Oct 23 '09 at 10:54

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