diff --git a/app/Controller/CouponController.php b/app/Controller/CouponController.php
index aa8739f..8c60721 100644
--- a/app/Controller/CouponController.php
+++ b/app/Controller/CouponController.php
@@ -231,7 +231,7 @@ class CouponController extends BaseController
         foreach ($data as $key => &$item) {
             if (in_array($item->id, $couponIds)) {
                 $notAvailable[] = $item;
-                unset($item);
+                unset($data[$key]);
             }
         }