Codeigniter LIKE запрос

Question

Я сталкиваюсь с этой ошибкой, когда запускаю свой запрос в Codeigniter

Error Number: 1267

Illegal mix of collations (latin1_swedish_ci,IMPLICIT) and (utf8_general_ci,COERCIBLE) for operation 'like'

SELECT * FROM sch_students WHERE gr_number LIKE '%رمیز%' ESCAPE '!' OR name LIKE '%رمیز%' ESCAPE '!'

Filename: D:/laragon/www/school_project/system/database/DB_driver.php

Line Number: 691

Это код моей модели

public function searching($detail)
{
    $this->db->select('*');
    $this->db->or_like('gr_number',$detail);
    $this->db->or_like('name',$detail);
    return $this->db->get("sch_students")->result();
}