diff --git a/advlabdb/adminModelViews.py b/advlabdb/adminModelViews.py
index 2009534..f0d7c1b 100644
--- a/advlabdb/adminModelViews.py
+++ b/advlabdb/adminModelViews.py
@@ -1161,14 +1161,16 @@ class ExperimentMarkView(SecureAdminModelView):
         return ExperimentMark(part_student=form.part_student.data, group_experiment=form.group_experiment.data)
 
     def update_model(self, form, model):
-        if (form.oral_mark is not None and form.oral_mark.data != model.oral_mark) or (
-            form.protocol_mark is not None and form.protocol_mark.data != model.protocol_mark
-        ):
+        if (form.oral_mark.data != model.oral_mark) or (form.protocol_mark.data != model.protocol_mark):
             model.admin = current_user.admin
 
             updateSuccessful = super().update_model(form, model)
 
-            model.part_student.checkThenSetFinalPartMark()
+            if updateSuccessful:
+                final_part_mark_changed = model.part_student.checkThenSetFinalPartMark()
+
+                if final_part_mark_changed:
+                    model.group_experiment.update_experiment_marks_missing()
 
             return updateSuccessful
 
diff --git a/advlabdb/assistantModelViews.py b/advlabdb/assistantModelViews.py
index 00c9fe7..8bf01e0 100644
--- a/advlabdb/assistantModelViews.py
+++ b/advlabdb/assistantModelViews.py
@@ -135,6 +135,7 @@ class AssistantGroupExperimentView(SecureAssistantModelView):
         ]
 
         if form.validate_on_submit():
+            any_final_part_mark_changed = False
             try:
                 for ind, appointment in enumerate(appointments):
                     appointment.date = appointment_fields[ind].data
@@ -152,9 +153,12 @@ class AssistantGroupExperimentView(SecureAssistantModelView):
 
                         experiment_mark.assistant = current_user.assistant
 
-                        experiment_mark.part_student.checkThenSetFinalPartMark()
+                        final_part_mark_changed = experiment_mark.part_student.checkThenSetFinalPartMark()
+                        if final_part_mark_changed:
+                            any_final_part_mark_changed = True
 
-                group_experiment.update_experiment_marks_missing()
+                if any_final_part_mark_changed:
+                    group_experiment.update_experiment_marks_missing()
 
                 group_experiment.note = form.note.data