diff --git a/server/openslides/poll/models.py b/server/openslides/poll/models.py
index d18ff0e12..a72e43617 100644
--- a/server/openslides/poll/models.py
+++ b/server/openslides/poll/models.py
@@ -275,9 +275,11 @@ class BasePoll(models.Model):
 
     def calculate_entitled_users(self):
         entitled_users = []
+        entitled_users_ids = set()
         for group in self.groups.all():
             for user in group.user_set.all():
-                if user.is_present:
+                if user.is_present and user.id not in entitled_users_ids:
+                    entitled_users_ids.add(user.id)
                     entitled_users.append(
                         {
                             "user_id": user.id,
diff --git a/server/tests/integration/motions/test_polls.py b/server/tests/integration/motions/test_polls.py
index 4743c72dd..730f9505e 100644
--- a/server/tests/integration/motions/test_polls.py
+++ b/server/tests/integration/motions/test_polls.py
@@ -1208,6 +1208,19 @@ class StopMotionPoll(TestCase):
             ],
         )
 
+    def test_stop_poll_assert_no_duplicate_entitled_users(self):
+        self.setup_entitled_users()
+        delegate_group = get_group_model().objects.get(pk=GROUP_DELEGATE_PK)
+        self.admin.groups.add(delegate_group)
+        self.poll.groups.add(delegate_group)
+
+        response = self.client.post(reverse("motionpoll-stop", args=[self.poll.pk]))
+        self.assertHttpStatusVerbose(response, status.HTTP_200_OK)
+        self.assertEqual(
+            MotionPoll.objects.get().entitled_users_at_stop,
+            [{"user_id": self.admin.id, "voted": False, "vote_delegated_to_id": None}],
+        )
+
 
 class PublishMotionPoll(TestCase):
     def advancedSetUp(self):