test/app/Http/Models/PrLandPage.php

<?php

namespace App\Http\Models;

use Illuminate\Database\Eloquent\Model;

class PrLandPage extends Model
{
    protected $primaryKey = 'id';
    protected $table = 'pr_land_page';
    protected $casts = [
        'sub_list' => 'array'
    ];
    public $guarded=[];

}