diff --git a/helper/exercises.py b/helper/exercises.py
index dd3b939..c516e6a 100644
--- a/helper/exercises.py
+++ b/helper/exercises.py
@@ -1260,13 +1260,14 @@ def replace_exercise_if_exists(all_exams, current_exercise, current_exam, seen_k
     for exam in all_exams:
         exam_dict = exam.to_dict()
         exercise_dict = exam_dict.get("parts", [])[0]
-        if any(
-                exercise["prompt"] == current_exercise["prompt"] and
-                any(exercise["options"][0]["text"] == current_option["text"] for current_option in
-                    current_exercise["options"])
-                for exercise in exercise_dict.get("exercises", [])[0]["questions"]
-        ):
-            return replace_exercise_if_exists(all_exams, generate_single_mc_level_question(), current_exam, seen_keys)
+        if len(exercise_dict.get("exercises", [])) > 0:
+            if any(
+                    exercise["prompt"] == current_exercise["prompt"] and
+                    any(exercise["options"][0]["text"] == current_option["text"] for current_option in
+                        current_exercise["options"])
+                    for exercise in exercise_dict.get("exercises", [])[0]["questions"]
+            ):
+                return replace_exercise_if_exists(all_exams, generate_single_mc_level_question(), current_exam, seen_keys)
     return current_exercise, seen_keys