diff --git a/asg_form/Controllers/Teamregistration/RegisterController.cs b/asg_form/Controllers/Teamregistration/RegisterController.cs
index 8a14f9b..d5718cd 100644
--- a/asg_form/Controllers/Teamregistration/RegisterController.cs
+++ b/asg_form/Controllers/Teamregistration/RegisterController.cs
@@ -26,7 +26,7 @@ namespace asg_form.Controllers.Teamregistration
     }
     public class userMsg
     {
-        public long? id { get; set; }
+        public long id { get; set; }
         public string chinaname { get; set; }
         public int userId { get; set; }
         public int sex { get; set; }