diff --git a/docs/example-data.json b/docs/example-data.json
index 93c3e1037..6136a3d61 100644
--- a/docs/example-data.json
+++ b/docs/example-data.json
@@ -1960,6 +1960,7 @@
         "title": "1",
         "description": "",
         "type": "analog",
+        "backend": "long",
         "is_pseudoanonymized": false,
         "pollmethod": "YNA",
         "state": "finished",
@@ -1988,6 +1989,7 @@
         "title": "2",
         "description": "",
         "type": "analog",
+        "backend": "long",
         "is_pseudoanonymized": false,
         "pollmethod": "YNA",
         "state": "created",
@@ -2016,6 +2018,7 @@
         "title": "1",
         "description": "",
         "type": "analog",
+        "backend": "long",
         "is_pseudoanonymized": false,
         "pollmethod": "YNA",
         "state": "created",
@@ -2044,6 +2047,7 @@
         "title": "2",
         "description": "",
         "type": "analog",
+        "backend": "long",
         "is_pseudoanonymized": false,
         "pollmethod": "Y",
         "state": "finished",
@@ -2072,6 +2076,7 @@
         "title": "Wahlgang",
         "description": "",
         "type": "named",
+        "backend": "long",
         "is_pseudoanonymized": false,
         "pollmethod": "Y",
         "state": "finished",
diff --git a/docs/models.yml b/docs/models.yml
index 5f0d8bfdc..c718e161c 100644
--- a/docs/models.yml
+++ b/docs/models.yml
@@ -1687,6 +1687,13 @@ poll:
       - analog
       - named
       - pseudoanonymous
+  backend:
+    type: string
+    required: True
+    default: long
+    enum:
+      - long
+      - fast
   is_pseudoanonymized: boolean
   pollmethod:
     type: string
diff --git a/openslides-backend b/openslides-backend
index 3e449bc4a..6cf84cd7c 160000
--- a/openslides-backend
+++ b/openslides-backend
@@ -1 +1 @@
-Subproject commit 3e449bc4a9987e35ebe366ec2790d88f5cc6dd05
+Subproject commit 6cf84cd7c1f907d0bbae406fc963b8ea3cfeab46
diff --git a/openslides-client b/openslides-client
index 99617212c..aa5d1ee10 160000
--- a/openslides-client
+++ b/openslides-client
@@ -1 +1 @@
-Subproject commit 99617212c88febfb19151aad0071e3dabdb410b1
+Subproject commit aa5d1ee106e66bf9990044027cb5ebd64452f139