exchange-2.0/app/Models/VoucherEntityMapping.php

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Relations\MorphTo;
use Illuminate\Database\Eloquent\SoftDeletes;

class VoucherEntityMapping extends AbstractModel
{
    use SoftDeletes;

    protected $table = 'voucher_entity_mappings';
    protected $dates = ['deleted_at'];

    /**
     * @return \Illuminate\Database\Eloquent\Relations\MorphTo
     */
    public function owner(): morphTo
    {
        return $this->morphTo();
    }

}