Плохо рыл. Это бородатый баг хз каких готов.
Вот почитай для просветления
У меня Н+, немного не так
mysql> explain users;
+----------------+---------------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+----------------+---------------------+------+-----+---------+----------------+
| id | int(11) | NO | PRI | NULL | auto_increment |
| name | varchar(64) | NO | UNI | NULL | |
| passwd | varchar(64) | NO | | NULL | |
| grp | tinyint(4) unsigned | NO | | 0 | |
| contract | tinytext | NO | | NULL | |
| contract_date | int(10) unsigned | NO | | NULL | |
| state | enum('off','on') | NO | MUL | on | |
| balance | float(10,2) | NO | | 0.00 | |
| limit_balance | float(6,2) | NO | | 0.00 | |
| block_if_limit | tinyint(4) | NO | | 0 | |
| modify_time | int(11) | NO | | 0 | |
| fio | tinytext | NO | | NULL | |
| discount | tinyint(4) | NO | | 0 | |
| cstate | int(11) | NO | | 0 | |
| cstate_time | int(10) unsigned | NO | | NULL | |
| comment | text | NO | | NULL | |
| lstate | tinyint(4) | NO | | 0 | |
+----------------+---------------------+------+-----+---------+----------------+
17 rows in set (0.00 sec)