diff --git a/anatomy/views.py b/anatomy/views.py
index 4f42c03f..8aab1d2b 100644
--- a/anatomy/views.py
+++ b/anatomy/views.py
@@ -658,6 +658,7 @@ def exam_scores_cid(request, pk):
         CidUserAnswer.objects.filter(question__in=questions)
         .order_by("cid")
         .values_list("cid", flat=True)
+        .distinct()
     )
 
     user_answers_and_marks = defaultdict(list)