Form Validation Not Working in Custom Post Type

This is My Code.

array(
 'id' => $prefix . 'name',
 'type' => 'text',
 'name' => esc_html__( 'Name', 'text-domain' ),
 'tab' => 'personal_information',
 'required' => true
),

And I am Used Validation Rules also,

'validation' => array(
    'rules' => array(
        'name' => array(
            'required' => true,
            'minlength' => 7
        ),
    ),
    'messages' => array(
        'field_id' => array(
            'required'  => 'Name is required',
            'minlength' => 'Name must be at least 7 characters',
        ),
    ),
),

Whats is the problem.the same code worked for me in Meta Box Old Version.