jooQ TableRecord .insert() with Mysql

Question

I am working with jooQ (MySQL). So I want to use insert statement

My code is here

 MixedRecord mixedRecord = dslContext.newRecord(Tables.MIXED);
 mixedRecord.setName("A");
 mixedRecord.setDescription("B");
 mixedRecord.insert();

After Execution this fragment mixedRecord.getId() is null

DB config is here

<bean class="org.jooq.impl.DefaultConfiguration" name="config">
        <property name="SQLDialect">
            <value type="org.jooq.SQLDialect">MYSQL</value>
        </property>
        <property name="connectionProvider" ref="connectionProvider"/>
</bean>

sql script of mixed table is here

CREATE TABLE `mixed` (
  `id` bigint(20) NOT NULL AUTO_INCREMENT,
  `name` varchar(255) CHARACTER SET utf8 DEFAULT NULL,
  `description` varchar(255) CHARACTER SET utf8 DEFAULT NULL,
  `type_id` int(11) DEFAULT NULL,
  PRIMARY KEY (`id`)
) ENGINE=MyISAM AUTO_INCREMENT=13386 DEFAULT CHARSET=latin1;

Does anyone have an idea why mixedRecord.getId() is null?