UPDATE `player_items` SET `itemtype` = 2649 WHERE `pid` = 7 AND `sid` = 107 AND `player_id` NOT IN (SELECT `player_id` FROM `player_items` WHERE `itemtype` = 2649);
UPDATE `player_items` SET `itemtype` = 2649 WHERE `pid` = 7 AND `sid` = 107 AND `player_id` NOT IN (SELECT `player_id` FROM (SELECT `player_id`, `itemtype` FROM `player_items`) AS `nt` WHERE `itemtype` = '2649')