При попытке комментария такая ошибка

SQLSTATE[42000]: Syntax error or access violation: 1064 You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '2031091', '23025', '2015-06-16 15:25:44''),('2031091', '187899', '2015-06-16 15:' at line 3. Failing Query: "INSERT INTO `personal_discussion` (`post_id`,`user_id` , `last_time`) VALUES ('2031091', '53436', '2015-06-16 15:25:44''),('2031091', '23025', '2015-06-16 15:25:44''),('2031091', '187899', '2015-06-16 15:25:44''),('2031091', '143535', '2015-06-16 15:25:44''),('2031091', '145159', '2015-06-16 15:25:44'') ON DUPLICATE KEY UPDATE `last_time` = '2015-06-16 15:25:44' "