php yii app

[CarlosKKK]

*** applying m160726_093217_create_user_table
> create table {{%user}} ... done (time: 0.006s)
> create table {{%profile}} ... done (time: 0.010s)
> insert into {{%user}} ... done (time: 0.003s)
> insert into {{%profile}} ...Exception 'yii\db\Exception' with message 'SQLSTATE[HY000]: General error: 1364 Field 'created_at' doesn't have a default value
The SQL being executed was: INSERT INTO yii2cmf_profile (user_id, locale) VALUES (1, 'zh-CN')'

in /app/test/yii2cmf/vendor/yiisoft/yii2/db/Schema.php:633

Error Info:
Array
(
[0] => HY000
[1] => 1364
[2] => Field 'created_at' doesn't have a default value
)