diff --git a/db/migrations/1.266_consultations_option_exclude_expired.php b/db/migrations/1.262_consultations_option_exclude_expired.php
similarity index 100%
rename from db/migrations/1.266_consultations_option_exclude_expired.php
rename to db/migrations/1.262_consultations_option_exclude_expired.php
diff --git a/db/migrations/1.269_fix_missing_consultation_events.php b/db/migrations/1.263_fix_missing_consultation_events.php
similarity index 100%
rename from db/migrations/1.269_fix_missing_consultation_events.php
rename to db/migrations/1.263_fix_missing_consultation_events.php
diff --git a/db/migrations/1.270_step_00332_mvv_overlapping_courses.php b/db/migrations/1.264_step_00332_mvv_overlapping_courses.php
similarity index 100%
rename from db/migrations/1.270_step_00332_mvv_overlapping_courses.php
rename to db/migrations/1.264_step_00332_mvv_overlapping_courses.php
diff --git a/db/migrations/1.271_jsonapi_cors_origin_config.php b/db/migrations/1.265_jsonapi_cors_origin_config.php
similarity index 100%
rename from db/migrations/1.271_jsonapi_cors_origin_config.php
rename to db/migrations/1.265_jsonapi_cors_origin_config.php
diff --git a/db/migrations/1.272_step_00338_instituteplaning.php b/db/migrations/1.266_step_00338_instituteplaning.php
similarity index 100%
rename from db/migrations/1.272_step_00338_instituteplaning.php
rename to db/migrations/1.266_step_00338_instituteplaning.php
diff --git a/db/migrations/1.273_config_for_download_counter_display.php b/db/migrations/1.267_config_for_download_counter_display.php
similarity index 100%
rename from db/migrations/1.273_config_for_download_counter_display.php
rename to db/migrations/1.267_config_for_download_counter_display.php
diff --git a/db/migrations/1.274_add_enable_free_access_for_courses_only.php b/db/migrations/1.268_add_enable_free_access_for_courses_only.php
similarity index 100%
rename from db/migrations/1.274_add_enable_free_access_for_courses_only.php
rename to db/migrations/1.268_add_enable_free_access_for_courses_only.php
diff --git a/db/migrations/1.275_additional_mvv_tables.php b/db/migrations/1.269_additional_mvv_tables.php
similarity index 100%
rename from db/migrations/1.275_additional_mvv_tables.php
rename to db/migrations/1.269_additional_mvv_tables.php
diff --git a/db/migrations/1.276_tic8458_add_upload_description.php b/db/migrations/1.270_tic8458_add_upload_description.php
similarity index 100%
rename from db/migrations/1.276_tic8458_add_upload_description.php
rename to db/migrations/1.270_tic8458_add_upload_description.php
diff --git a/db/migrations/1.277_room_management_migration.php b/db/migrations/1.271_room_management_migration.php
similarity index 100%
rename from db/migrations/1.277_room_management_migration.php
rename to db/migrations/1.271_room_management_migration.php
diff --git a/db/migrations/1.278_resize_auth_user_md5_email_field.php b/db/migrations/1.272_resize_auth_user_md5_email_field.php
similarity index 100%
rename from db/migrations/1.278_resize_auth_user_md5_email_field.php
rename to db/migrations/1.272_resize_auth_user_md5_email_field.php
diff --git a/db/migrations/1.268_unrestricted_userdomains.php b/db/migrations/1.273_unrestricted_userdomains.php
similarity index 100%
rename from db/migrations/1.268_unrestricted_userdomains.php
rename to db/migrations/1.273_unrestricted_userdomains.php
diff --git a/db/migrations/1.262_blubbermessenger.php b/db/migrations/1.274_blubbermessenger.php
similarity index 100%
rename from db/migrations/1.262_blubbermessenger.php
rename to db/migrations/1.274_blubbermessenger.php
diff --git a/db/migrations/1.263_blubbermessenger_keys.php b/db/migrations/1.275_blubbermessenger_keys.php
similarity index 100%
rename from db/migrations/1.263_blubbermessenger_keys.php
rename to db/migrations/1.275_blubbermessenger_keys.php
diff --git a/db/migrations/1.264_blubbermessenger_search.php b/db/migrations/1.276_blubbermessenger_search.php
similarity index 100%
rename from db/migrations/1.264_blubbermessenger_search.php
rename to db/migrations/1.276_blubbermessenger_search.php
diff --git a/db/migrations/1.265_blubbermessenger_flat.php b/db/migrations/1.277_blubbermessenger_flat.php
similarity index 100%
rename from db/migrations/1.265_blubbermessenger_flat.php
rename to db/migrations/1.277_blubbermessenger_flat.php
diff --git a/db/migrations/1.267_jsonapi_dangerous_routes_config.php b/db/migrations/1.278_jsonapi_dangerous_routes_config.php
similarity index 100%
rename from db/migrations/1.267_jsonapi_dangerous_routes_config.php
rename to db/migrations/1.278_jsonapi_dangerous_routes_config.php
diff --git a/db/migrations/1.284_change_schedule_color_with_category_index.php b/db/migrations/1.283_change_schedule_color_with_category_index.php
similarity index 100%
rename from db/migrations/1.284_change_schedule_color_with_category_index.php
rename to db/migrations/1.283_change_schedule_color_with_category_index.php
diff --git a/db/migrations/1.285_fixes_on_schedule_coloring.php b/db/migrations/1.284_fixes_on_schedule_coloring.php
similarity index 100%
rename from db/migrations/1.285_fixes_on_schedule_coloring.php
rename to db/migrations/1.284_fixes_on_schedule_coloring.php
diff --git a/db/migrations/1.283_add_filetypes.php b/db/migrations/1.285_add_filetypes.php
similarity index 100%
rename from db/migrations/1.283_add_filetypes.php
rename to db/migrations/1.285_add_filetypes.php
diff --git a/lib/migrations/DBSchemaVersion.php b/lib/migrations/DBSchemaVersion.php
index 0a14558b592f79e9410604e44bec72826f60a972..846a544cae831252709702308189c9efaa13f9bf 100644
--- a/lib/migrations/DBSchemaVersion.php
+++ b/lib/migrations/DBSchemaVersion.php
@@ -166,9 +166,9 @@ class DBSchemaVersion implements SchemaVersion
         $result = $db->query("SHOW TABLES LIKE 'schema_versions'");
 
         if ($result && $result->rowCount() > 0) {
-            $base_version = 269;    // 4.4
+            $base_version = 263;    // 4.4
             $schema_mapping = [
-                20200307 => 285,    // 4.5
+                20200307 => 284,    // 4.5
                 20200522 => 290,    // 4.6
                 20210511 => 327     // 5.0
             ];