修复支付问题

manage-server/app/Http/Controllers/PaymentController.php

             if(Carbon::now()->subHour()->gt($order->created_at)) {
                 $order_new = clone $order;
                 $order_new->id = null;
-                dd($order_new->exists());
+                $order_new->exists = false;
                 $order_new->save();
                 $order->delete();
                 $order_id = $order_new->id;

manage-server/app/Models/Order.php

     public function mergeFillable($fillable) {
         $this->fillable = array_merge($this->fillable, $fillable);
     }
-
-    public function exists() {
-        return $this->exists;
-    }
 }