Extension:SecurePoll/securepoll strike table

mysql> describe securepoll_strike;
+--------------+----------------+------+-----+---------+----------------+
| Field        | Type           | Null | Key | Default | Extra          |
+--------------+----------------+------+-----+---------+----------------+
| st_id        | int(11)        | NO   | PRI | NULL    | auto_increment |
| st_vote      | int(11)        | NO   | MUL | NULL    |                |
| st_timestamp | varbinary(14)  | NO   |     | NULL    |                |
| st_action    | varbinary(32)  | NO   |     | NULL    |                |
| st_reason    | varbinary(255) | NO   |     | NULL    |                |
| st_user      | int(11)        | NO   |     | NULL    |                |
+--------------+----------------+------+-----+---------+----------------+