diff --git a/generic/views.py b/generic/views.py
index e5121094..c4a3540c 100644
--- a/generic/views.py
+++ b/generic/views.py
@@ -962,8 +962,9 @@ def create_cid_users(request):
             passcode = "".join(random.choices(string.ascii_uppercase, k=4))
             c = CidUser(cid=new_cid, passcode=passcode)
             c.save()
-            c.physics_exams.set(physics_exams)
-            c.save()
+            if physics_exams:
+                c.physics_exams.set(physics_exams)
+                c.save()
             new_cid = new_cid + 1
 
         return JsonResponse({"status": "success"})