diff --git a/openslides/agenda/models.py b/openslides/agenda/models.py
index 6896afe20..dc2f83bb0 100644
--- a/openslides/agenda/models.py
+++ b/openslides/agenda/models.py
@@ -331,7 +331,7 @@ class SpeakerManager(models.Manager):
     """
     Manager for Speaker model. Provides a customized add method.
     """
-    def add(self, user, item):
+    def add(self, user, item, skip_autoupdate=False):
         """
         Customized manager method to prevent anonymous users to be on the
         list of speakers and that someone is twice on one list (off coming
@@ -345,7 +345,9 @@ class SpeakerManager(models.Manager):
                 _('An anonymous user can not be on lists of speakers.'))
         weight = (self.filter(item=item).aggregate(
             models.Max('weight'))['weight__max'] or 0)
-        return self.create(item=item, user=user, weight=weight + 1)
+        speaker = self.model(item=item, user=user, weight=weight + 1)
+        speaker.save(force_insert=True, skip_autoupdate=skip_autoupdate)
+        return speaker
 
 
 class Speaker(RESTModelMixin, models.Model):
diff --git a/openslides/agenda/views.py b/openslides/agenda/views.py
index b8a8e1c82..0de3884f2 100644
--- a/openslides/agenda/views.py
+++ b/openslides/agenda/views.py
@@ -135,9 +135,13 @@ class ItemViewSet(ListModelMixin, RetrieveModelMixin, UpdateModelMixin, GenericV
                     except (ValueError, Speaker.DoesNotExist):
                         pass
                     else:
-                        speaker.delete()
+                        speaker.delete(skip_autoupdate=True)
                         deleted_speaker_name = speaker
                         deleted_speaker_count += 1
+                # send autoupdate if speakers are deleted
+                if deleted_speaker_count > 0:
+                    inform_changed_data(item)
+
                 if deleted_speaker_count > 1:
                     message = str(deleted_speaker_count) + ' ' + _('speakers have been removed from the list of speakers.')
                 elif deleted_speaker_count == 1:
diff --git a/openslides/assignments/models.py b/openslides/assignments/models.py
index ae0f81dae..a6f6d1489 100644
--- a/openslides/assignments/models.py
+++ b/openslides/assignments/models.py
@@ -283,11 +283,12 @@ class Assignment(RESTModelMixin, models.Model):
         # TODO: Try to do this in a bulk create
         for candidate in self.candidates:
             try:
-                Speaker.objects.add(candidate, self.agenda_item)
+                Speaker.objects.add(candidate, self.agenda_item, skip_autoupdate=True)
             except OpenSlidesError:
                 # The Speaker is already on the list. Do nothing.
                 # TODO: Find a smart way not to catch the error concerning AnonymousUser.
                 pass
+        inform_changed_data(self.agenda_item)
 
         return poll