diff --git a/app/Http/Controllers/Web/Shop/Config/Certification/RegisterController.php b/app/Http/Controllers/Web/Shop/Config/Certification/RegisterController.php
index 7dfc6f6..2871f53 100644
--- a/app/Http/Controllers/Web/Shop/Config/Certification/RegisterController.php
+++ b/app/Http/Controllers/Web/Shop/Config/Certification/RegisterController.php
@@ -34,11 +34,14 @@ class RegisterController extends WebController
         $param = $this->param;
 
         // 重複チェック
-        if (ShopNoRelation::whereShopId($param->shopId)
-            ->whereParkingManagementCode($param->parkingManagementCode)
+        if (ShopNoRelation::byKey(
+            $param->shopId,
+            $param->parkingManagementCode,
+            QRServiceUsage::認証方式
+        )
             ->exists()
         ) {
-            ParamException::throw(ColumnName::PARKING_MANAGEMENT_CODE, trans("validation.exists"));
+            ParamException::throw(ColumnName::PARKING_MANAGEMENT_CODE, trans("validation.unique"));
         }
 
         $relation = new ShopNoRelation();