diff --git a/atlas/models.py b/atlas/models.py
index c0aef884..19338d70 100644
--- a/atlas/models.py
+++ b/atlas/models.py
@@ -1028,6 +1028,12 @@ class SeriesDetail(models.Model):
 
 
 class CaseDetail(models.Model):
+    """A through table that stores the relationship between a case and a collection.
+
+    This is what user answers are linked to (as there be different questions for the same case in a different collection)
+
+    The collection questions and answers are also defined here.
+    """
     case = models.ForeignKey(Case, on_delete=models.CASCADE)
     collection = models.ForeignKey(CaseCollection, on_delete=models.CASCADE)
 
@@ -1109,8 +1115,15 @@ class BaseReportAnswer(models.Model):
         for name, value in self.question.question_schema["properties"].items():
             print(name, value)
 
-            user_answer = self.json_answer[name]
-            correct_answer = self.question.question_answers[name]
+            try: 
+                user_answer = self.json_answer[name]
+            except KeyError: # If the schema has changed?
+                user_answer = ""
+            try: 
+                correct_answer = self.question.question_answers[name]
+            except KeyError: # If the schema has changed?
+                correct_answer = ""
+
             print(correct_answer)
 
             match value:
diff --git a/atlas/templates/atlas/collection_case_detail.html b/atlas/templates/atlas/collection_case_detail.html
index 3c354061..146eb488 100644
--- a/atlas/templates/atlas/collection_case_detail.html
+++ b/atlas/templates/atlas/collection_case_detail.html
@@ -18,6 +18,15 @@
 
     <h2>Case: <a href="{% url 'atlas:case_detail' case_detail.case.pk %}">{{case_detail.case.title}}</a></h2>
 
+    {% if case_detail.question_schema is not None and not case_detail.question_answers %}
+        
+        
+    <div class="alert alert-danger" role="alert">
+        <h4 class="alert-heading">Answers not defined!</h4>
+        <p>A question schema has been defined but no question answers are found.</p>
+    </div>
+    {% endif %}
+
     <p>This form allows you to add questions to a case. A example of how the quesiton will be displayed is shown below.</p>
     <p>If answers are supplied the question will be automarked</p>
 
diff --git a/atlas/templates/atlas/collection_detail.html b/atlas/templates/atlas/collection_detail.html
index be4c840c..8b7ee981 100644
--- a/atlas/templates/atlas/collection_detail.html
+++ b/atlas/templates/atlas/collection_detail.html
@@ -44,6 +44,21 @@
         </button>
             <div id='case-list'></div>
         </p>
+
+        <details>
+            <summary>Answer management</summary>
+
+            <div class="alert alert-danger">
+            <p>Manage answers for this collection. </p>
+
+            Please note these are permanant and cannot be undone.
+            </div>
+
+            <button title="This will clear all user answers and attempts"
+            hx-post="{% url 'atlas:collection_reset_answers' collection.pk %}"
+            >Reset all answers</button>
+            
+        </summary>
     {% endif %}
     {% include 'exam_overview_js.html' %}
 {% endblock %}
diff --git a/atlas/urls.py b/atlas/urls.py
index 6cdb342f..535fb325 100755
--- a/atlas/urls.py
+++ b/atlas/urls.py
@@ -131,6 +131,11 @@ urlpatterns = [
         views.collection_question_schemas,
         name="collection_question_schemas",
     ),
+    path(
+        "collection/<int:exam_id>/reset_answers",
+        views.collection_reset_answers,
+        name="collection_reset_answers",
+    ),
     #path(
     #    "question_schemas_preset",
     #    views.question_schemas_preset,
diff --git a/atlas/views.py b/atlas/views.py
index ffc24d05..06132ce0 100755
--- a/atlas/views.py
+++ b/atlas/views.py
@@ -2824,3 +2824,25 @@ def collection_question_schemas(request, exam_id: int):
             "case_details": case_details,
         },
     )
+
+def collection_reset_answers(request, exam_id: int):
+    if request.htmx:
+        collection = get_object_or_404(CaseCollection, pk=exam_id)
+
+        # Select all case details (answers are linked to these)
+        case_details = collection.casedetail_set.all().prefetch_related()
+
+        # Delete all answers
+        cid_answers = case_details.cidreportanswer_set.all()
+        user_answers = case_details.userreportanswer_set.all()
+
+        
+        # User statuses
+        collection.exam_user_status.all().delete()
+
+        # CidUserExams
+        CidUserExam.objects.filter(exam=collection).delete()
+        
+
+    else:
+        raise Http404("Invalid request")
\ No newline at end of file