CVoteCacheManager::OnBeforeVoteQuestionUpdate

function OnBeforeVoteQuestionUpdate(&$ID, &$arFields)
{
	if (array_key_exists("VOTE_ID", $arFields))
	{
		$db_res = CVoteQuestion::GetByID($ID);
		if ($db_res && ($res = $db_res->Fetch()))
			self::ClearTag("V", $res["VOTE_ID"]);
	}
}