Deleting Duplicate Threads That Do NOT Share The Same Timestamp

[TruthElixirX]

I need to delete some duplicate threads, but they do not have the same time stamp.

I opened up admincp/misc.php and went to:

	$threads = $db->query_read("
		SELECT threadid, title, forumid, postusername, dateline
		FROM " . TABLE_PREFIX . "thread WHERE threadid >= " . $vbulletin->GPC['startat'] . "
		ORDER BY threadid
		LIMIT " . $vbulletin->GPC['perpage']
	);

	$finishat = $vbulletin->GPC['startat'];

	while ($thread = $db->fetch_array($threads))
	{
		$deletethreads = $db->query_read("
			SELECT *
			FROM " . TABLE_PREFIX . "thread
			WHERE title = '" . $db->escape_string($thread['title']) . "' AND
				forumid = $thread[forumid] AND
				postusername = '" . $db->escape_string($thread['postusername']) . "' AND
				dateline = $thread[dateline] AND
				threadid > $thread[threadid]
		");

and changed it to (I removed what was colored blue above) :

	$threads = $db->query_read("
		SELECT threadid, title, forumid, postusername
		FROM " . TABLE_PREFIX . "thread WHERE threadid >= " . $vbulletin->GPC['startat'] . "
		ORDER BY threadid
		LIMIT " . $vbulletin->GPC['perpage']
	);

	$finishat = $vbulletin->GPC['startat'];

	while ($thread = $db->fetch_array($threads))
	{
		$deletethreads = $db->query_read("
			SELECT *
			FROM " . TABLE_PREFIX . "thread
			WHERE title = '" . $db->escape_string($thread['title']) . "' AND
				forumid = $thread[forumid] AND
				postusername = '" . $db->escape_string($thread['postusername']) . "' AND
				threadid > $thread[threadid]
		");

This gets rid of the time stamp requirement, but now, I need to limit it to a specific username/id. How do I do this?