diff --git a/backend/src/app/loggers/mattermost.clj b/backend/src/app/loggers/mattermost.clj
index 34120a3604..fc0109bdda 100644
--- a/backend/src/app/loggers/mattermost.clj
+++ b/backend/src/app/loggers/mattermost.clj
@@ -63,15 +63,12 @@
   [cfg {:keys [host version id] :as cdata}]
   (try
     (let [uri  (:uri cfg)
-          text (str "Unhandled exception:\n"
-                    "- detail: " (cfg/get :public-uri) "/dbg/error-by-id/" id "\n"
-                    "- profile-id: `" (:profile-id cdata) "`\n"
-                    "- host: `" host "`\n"
-                    "- version: `" version "`\n")
-          rsp    (http/send! {:uri uri
-                              :method :post
-                              :headers {"content-type" "application/json"}
-                              :body (json/encode-str {:text text})})]
+          text (str "Unhandled exception (host: " host ", url: " (cfg/get :public-uri) "/dbg/error-by-id/" id "\n"
+                    "- profile-id: #" (:profile-id cdata) "\n")
+          rsp  (http/send! {:uri uri
+                            :method :post
+                            :headers {"content-type" "application/json"}
+                            :body (json/encode-str {:text text})})]
       (when (not= (:status rsp) 200)
         (l/error :hint "error on sending data to mattermost"
                  :response (pr-str rsp))))
diff --git a/common/src/app/common/pages/common.cljc b/common/src/app/common/pages/common.cljc
index 29319abef4..8a99ac3f3c 100644
--- a/common/src/app/common/pages/common.cljc
+++ b/common/src/app/common/pages/common.cljc
@@ -8,7 +8,7 @@
   (:require
    [app.common.uuid :as uuid]))
 
-(def file-version 8)
+(def file-version 11)
 (def default-color "#b1b2b5") ;; $color-gray-20
 (def root uuid/zero)
 
diff --git a/common/src/app/common/pages/migrations.cljc b/common/src/app/common/pages/migrations.cljc
index 7a12167807..f06c79563f 100644
--- a/common/src/app/common/pages/migrations.cljc
+++ b/common/src/app/common/pages/migrations.cljc
@@ -222,3 +222,49 @@
         (update :pages-index #(d/mapm clean-container %))
         (d/update-when :components #(d/mapm clean-container %)))))
 
+(defmethod migrate 9
+  [data]
+  (letfn [(find-empty-groups [objects]
+            (->> (vals objects)
+                 (filter (fn [shape]
+                           (and (= :group (:type shape))
+                                (or (empty? (:shapes shape))
+                                    (every? (fn [child-id]
+                                              (not (contains? objects child-id)))
+                                            (:shapes shape))))))
+                 (map :id)))
+
+          (calculate-changes [[page-id page]]
+            (let [objects (:objects page)
+                  eids    (find-empty-groups objects)]
+
+              (map (fn [id]
+                     {:type :del-obj
+                      :page-id page-id
+                      :id id})
+                   eids)))]
+
+    (loop [data data]
+      (let [changes (mapcat calculate-changes (:pages-index data))]
+        (if (seq changes)
+          (recur (cp/process-changes data changes))
+          data)))))
+
+(defmethod migrate 10
+  [data]
+  (letfn [(update-page [_ page]
+            (d/update-in-when page [:objects uuid/zero] dissoc :points :selrect))]
+    (update data :pages-index #(d/mapm update-page %))))
+
+(defmethod migrate 11
+  [data]
+  (letfn [(update-object [objects id shape]
+            (if (= :frame (:type shape))
+              (d/update-when shape :shapes (fn [shapes]
+                                             (filterv (fn [id] (contains? objects id)) shapes)))
+              shape))
+
+          (update-page [_ page]
+            (update page :objects #(d/mapm (partial update-object %) %)))]
+
+    (update data :pages-index #(d/mapm update-page %))))