diff --git a/.github/workflows/md5_check_initial-data.yml b/.github/workflows/md5_check_initial-data.yml
index 4fcc9e523..28e9c5b16 100644
--- a/.github/workflows/md5_check_initial-data.yml
+++ b/.github/workflows/md5_check_initial-data.yml
@@ -21,4 +21,4 @@ jobs:
         run: md5sum docker/initial-data.json
 
       - name: Validate and protect initial-data.json
-        run: echo "eb70fc8581fc011b5da4b022068564b9  docker/initial-data.json" | md5sum -c -
+        run: echo "1bd1aa2d687de8b21cabe0274c3e6779  docker/initial-data.json" | md5sum -c -
diff --git a/docker/initial-data.json b/docker/initial-data.json
index 98ffe860a..b84539391 100644
--- a/docker/initial-data.json
+++ b/docker/initial-data.json
@@ -1,5 +1,5 @@
 {
-    "_migration_index": 5,
+    "_migration_index": 7,
     "organization": {
         "1": {
             "id": 1,
diff --git a/docs/models.yml b/docs/models.yml
index 4cf99f5de..156c76f4c 100644
--- a/docs/models.yml
+++ b/docs/models.yml
@@ -2882,7 +2882,7 @@ mediafile:
     on_delete: CASCADE
     equal_fields: meeting_id
     restriction_mode: B
-    required: true
+    required: false
   projection_ids:
     type: relation-list
     to: projection/content_object_id
diff --git a/openslides-backend b/openslides-backend
index 10a728f82..b6ab32a66 160000
--- a/openslides-backend
+++ b/openslides-backend
@@ -1 +1 @@
-Subproject commit 10a728f826945de6fbd3b9e16360fceda46cd778
+Subproject commit b6ab32a666a6c9986674ba50d25cf07c2d80129d