Extra fields not saved about pagemanager HOT 7 CLOSED

<?php namespace App\Http\Controllers\Admin;

use Backpack\CRUD\app\Http\Controllers\CrudController;
use Backpack\PageManager\app\Http\Controllers\Admin\PageCrudController as OriginalPageCrudController;
use App\PageTemplates;

// VALIDATION: change the requests to match your own file names if you need form validation
use Backpack\PageManager\app\Http\Requests\PageRequest as StoreRequest;
use Backpack\PageManager\app\Http\Requests\PageRequest as UpdateRequest;

class PageCrudController extends OriginalPageCrudController {

    public function __construct($template_name = false)
    {
        /*
        |--------------------------------------------------------------------------
        | BASIC CRUD INFORMATION
        |--------------------------------------------------------------------------
        */
        $this->crud->setModel("App\Models\Page");
        $this->crud->setRoute(config('backpack.base.route_prefix').'/page');
        $this->crud->setEntityNameStrings('page', 'pages');

        /*
        |--------------------------------------------------------------------------
        | COLUMNS
        |--------------------------------------------------------------------------
        */

        $this->crud->addColumn('name');
        $this->crud->addColumn([
                                'name' => 'template',
                                'type' => 'model_function',
                                'function_name' => 'getTemplateName',
                                ]);
        $this->crud->addColumn('slug');

        /*
        |--------------------------------------------------------------------------
        | FIELDS
        |--------------------------------------------------------------------------
        */

        // In PageManager,
        // - default fields, that all templates are using, are set using $this->addDefaultPageFields();
        // - template-specific fields are set per-template, in the PageTemplates trait;


        /*
        |--------------------------------------------------------------------------
        | BUTTONS
        |--------------------------------------------------------------------------
        */
        $this->crud->addButtonFromModelFunction('line', 'open', 'getOpenButton', 'beginning');
    }
}