Moving Replies add-on has been updated recently (both under Downloads and Compiler) to reduce resources on database when moving multiple messages at once. The fix is quite easy: under addon_movepost2.php, look up for the code which says:
$topic_id=$topicid;
foreach($movedMsgs as $postid) $tot+=updateArray(array('topic_id'),$Tp,'post_id',$postid);
$forum_id=$fornew;
foreach($movedMsgs as $postid) $tot+=updateArray(array('forum_id'),$Tp,'post_id',$postid);
it has been replaced to:
$topic_id=$topicid;
$forum_id=$fornew;
foreach($movedMsgs as $postid) {
$tot+=updateArray(array('topic_id', 'forum_id'), $Tp, 'post_id', $postid);
}
That way we reduce duplicate update operations which affect MINIBB_POSTS table.