diff --git a/web/App_Code/api/memberController.cs b/web/App_Code/api/memberController.cs
index 0be0c1a..2a37b67 100644
--- a/web/App_Code/api/memberController.cs
+++ b/web/App_Code/api/memberController.cs
@@ -107,8 +107,8 @@ public class memberController : BaseApiController
                     }
                 }
 
-                var prod2 = _db.member_check.Where(q => getDelItem.Contains(q.mem_num)).ToList();
-                if (prod2.Count > 0)
+                var prod2 = _db.member_check.Where(q => q.mem_num.HasValue && getDelItem.Contains(q.mem_num.Value)).ToList();
+                if (prod2.Count() > 0)
                 {
                     _db.member_check.RemoveRange(prod2);
                     //_db.SaveChanges();