diff --git a/asg_form/Controllers/Teamregistration/RegisterController.cs b/asg_form/Controllers/Teamregistration/RegisterController.cs
index f1a7f5e..ba0bb39 100644
--- a/asg_form/Controllers/Teamregistration/RegisterController.cs
+++ b/asg_form/Controllers/Teamregistration/RegisterController.cs
@@ -67,7 +67,7 @@ namespace asg_form.Controllers.Teamregistration
             {
                
 
-                if (msg.id == null&&sub.T_Comform.Find(msg.userId) != null)
+                if (msg.id == null && sub.T_Comform.Any(n => n.user_id==msg.userId))
                 {
                     return Ok(new error_mb { code = 400, message = "你已经提交过表单了，请不要重复提交" });
                 }