Fixed

app/Controller/CouponController.php

@@ -225,16 +225,18 @@ class CouponController extends BaseController
         $redis = $container->get(Redis::class);
         $couponIds = $redis->sMembers('coupon_'.date('Ymd').'_used_'.$userId);
 
+        $available = [];
         $notAvailable = [];
         foreach ($data as $key => &$item) {
             if (in_array($item->id, $couponIds)) {
                 $notAvailable[] = $item;
-                unset($data[$key]);
+            } else {
+                $available[] = $item;
             }
         }
 
         return $this->success([
-            'available' => $data,
+            'available' => $available,
             'not_available' => $notAvailable
         ]);