diff --git a/scripts/_common.sh b/scripts/_common.sh
index b73042c..aa3c17a 100644
--- a/scripts/_common.sh
+++ b/scripts/_common.sh
@@ -5,7 +5,7 @@
 #=================================================
 
 # dependencies used by the app
-pkg_dependencies="curl tar pkg-config libssl-dev libc6-dev at"
+pkg_dependencies="curl tar pkg-config libssl-dev libc6-dev"
 
 #=================================================
 # PERSONAL HELPERS
diff --git a/scripts/upgrade b/scripts/upgrade
index 0459bb6..36274b6 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -33,28 +33,6 @@ ynh_script_progression --message="Checking version..."
 
 upgrade_type=$(ynh_check_app_version_changed)
 
-#=================================================
-# ENSURE DOWNWARD COMPATIBILITY
-#=================================================
-ynh_script_progression --message="Ensuring downward compatibility..."
-
-# Cleaning legacy permissions
-if ynh_legacy_permissions_exists; then
-	ynh_legacy_permissions_delete_all
-
-	ynh_app_setting_delete --app=$app --key=is_public
-fi
-
-if ! ynh_permission_exists --permission="admin"; then
-	# Create the required permissions
-	ynh_permission_create --permission="admin" --url="/admin" --allowed=$admin --show_tile="false"
-fi
-
-# Create a permission if needed
-if ! ynh_permission_exists --permission="api"; then
-	ynh_permission_create --permission="api" --url="/api" --additional_urls="/identity/connect/token" --allowed="visitors" --auth_header="false" --show_tile="false" --protected="true"
-fi
-
 #=================================================
 # BACKUP BEFORE UPGRADE THEN ACTIVE TRAP
 #=================================================
@@ -86,6 +64,7 @@ ynh_systemd_action --service_name=$app --action="stop" --log_path="systemd" --li
 #=================================================
 
 ynh_handle_app_migration --migration_id="bitwarden" --migration_list="bitwarden_migration"
+
 if [ $migration_process -eq 1 ]
 then
 	# If a migration has been perform
@@ -99,6 +78,28 @@ then
 	ynh_secure_remove --file="$final_path/live/bitwarden_rs"
 fi
 
+#=================================================
+# ENSURE DOWNWARD COMPATIBILITY
+#=================================================
+ynh_script_progression --message="Ensuring downward compatibility..."
+
+# Cleaning legacy permissions
+if ynh_legacy_permissions_exists; then
+	ynh_legacy_permissions_delete_all
+
+	ynh_app_setting_delete --app=$app --key=is_public
+fi
+
+if ! ynh_permission_exists --permission="admin"; then
+	# Create the required permissions
+	ynh_permission_create --permission="admin" --url="/admin" --allowed=$admin --show_tile="false"
+fi
+
+# Create a permission if needed
+if ! ynh_permission_exists --permission="api"; then
+	ynh_permission_create --permission="api" --url="/api" --additional_urls="/identity/connect/token" --allowed="visitors" --auth_header="false" --show_tile="false" --protected="true"
+fi
+
 #=================================================
 # CREATE DEDICATED USER
 #=================================================
diff --git a/scripts/ynh_handle_app_migration b/scripts/ynh_handle_app_migration
index 2873896..22f2d62 100644
--- a/scripts/ynh_handle_app_migration
+++ b/scripts/ynh_handle_app_migration
@@ -47,6 +47,9 @@
 # | arg: -i, --migration_id= - ID from which to migrate
 # | arg: -l, --migration_list= - File specifying every file to move (one file per line)
 ynh_handle_app_migration ()  {
+  # Need for end of install
+  ynh_package_install at
+
   #=================================================
   # LOAD SETTINGS
   #=================================================
@@ -99,7 +102,7 @@ ynh_handle_app_migration ()  {
 
     # TODO Handle multi instance apps...
     # Check that there is not already an app installed for this id.
-    (yunohost app list | grep -q "id: $new_app") \
+    (yunohost app list | grep -q -w "id: $new_app") \
     && ynh_die --message="$new_app is already installed"
 
     #=================================================
@@ -126,6 +129,7 @@ ynh_handle_app_migration ()  {
 
     local settings_dir="/etc/yunohost/apps"
     cp -a "$settings_dir/$old_app" "$settings_dir/$new_app"
+    cp -a ../{scripts,conf} "$settings_dir/$new_app"
 
     # Replace the old id by the new one
     ynh_replace_string --match_string="\(^id: .*\)$old_app" --replace_string="\1$new_app" --target_file="$settings_dir/$new_app/settings.yml"
@@ -143,6 +147,9 @@ ynh_handle_app_migration ()  {
         new_label=$(echo $new_app_id | cut -c1 | tr [:lower:] [:upper:])$(echo $new_app_id | cut -c2-)
         ynh_app_setting_set --app=$new_app --key=label --value=$new_label
     fi
+    
+    yunohost tools shell -c "from yunohost.permission import permission_delete; permission_delete('$old_app.main', force=True, sync_perm=False)"
+    yunohost tools shell -c "from yunohost.permission import permission_create; permission_create('$new_app.main', url='/' , sync_perm=True)"
 
     #=================================================
     # MOVE FILES TO THE NEW DESTINATION
@@ -210,19 +217,6 @@ ynh_handle_app_migration ()  {
         ynh_app_setting_set --app=$new_app --key=db_name --value=$db_name
     fi
 
-    #=================================================
-    # CREATE A NEW USER
-    #=================================================
-
-    new_final_path=$(ynh_app_setting_get --app=$new_app --key=final_path)
-
-    # Check if the user exists on the system
-    if ynh_system_user_exists --username="$old_app"
-    then
-      ynh_print_info --message="Create a new user $new_app to replace $old_app" >&2
-      ynh_system_user_create --username=$app --home_dir="$new_final_path"
-    fi
-
     #=================================================
     # CHANGE THE FAKE DEPENDENCIES PACKAGE
     #=================================================
@@ -252,7 +246,6 @@ ynh_handle_app_migration ()  {
 
     app=$new_app
 
-
     # Set migration_process to 1 to inform that an upgrade has been made
     migration_process=1
   fi