Model - no data to update

My model :

PHP Code:

public function updateTest($id, $stat, $title) {
    $this->asArray()->where(['id' => 2])->protect(false)->update([
      'stat' => $stat,
      'title'=> $title]);
 } 


returned :

CodeIgniter\Database\Exceptions\DataException

There is no data to update.

In POST i look all key and value.

Tell me what could be a mistake? Thank you!