diff --git a/Backend/Controllers/SystemCategoryController.cs b/Backend/Controllers/SystemCategoryController.cs
index 0ce5a7b..2964e7c 100644
--- a/Backend/Controllers/SystemCategoryController.cs
+++ b/Backend/Controllers/SystemCategoryController.cs
@@ -628,7 +628,7 @@ namespace Backend.Controllers
                 //            JOIN variable sv ON di.device_name_tag = sv.system_value
                 //            JOIN variable mv ON sv.system_parent_id = mv.id AND di.device_system_tag = mv.system_value
                 //            WHERE sv.id = @id AND di.deleted = @Deleted and di.device_building_tag = @building_tag and di.is_link = 1";
-                var sql = @"SELECT min(di.id), di.full_name, di.points, di.unit, di.is_show, di.is_show_riserDiagram, di.is_controll, di.is_bool, di.is_link, di.is_show_history, di.device_system_tag, di.device_name_tag
+                var sql = @"SELECT min(di.id) as id, di.full_name, di.points, di.unit, di.is_show, di.is_show_riserDiagram, di.is_controll, di.is_bool, di.is_link, di.is_show_history, di.device_system_tag, di.device_name_tag
                             FROM device_item di
                             JOIN variable sv ON di.device_name_tag = sv.system_value
                             JOIN variable mv ON sv.system_parent_id = mv.id AND di.device_system_tag = mv.system_value