MySQL (v5.41) on Ubuntu is inserting rows with primary key value as 0.

Below is the MySQL table data.

```
mysql> select id from keywords where text_id = 72;
+----+
| id |
+----+
|  0 |
|  0 |
+----+

| keywords | CREATE TABLE `keywords` (
  `id` int(11) NOT NULL DEFAULT '0',
 `to_user_id` bigint(20) DEFAULT NULL,
  `text_id` int(11) DEFAULT NULL
  ) ENGINE=MyISAM DEFAULT CHARSET=latin1 |

```

+--------+---------------------------------