Don't update user if it doesn't exist

.app_version

@@ -1 +1 @@
-0.13.3
+0.13.4

CHANGELOG.md

@@ -5,6 +5,13 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/)
 and this project adheres to [Semantic Versioning](http://semver.org/).
 
+## [0.13.4] — 2024-09-06
+
+### Fixed
+
+- Fixed a bug preventing the application from starting, when there is no users in the database but a data migration tries to update one.
+
+
 ## [0.13.3] — 2024-09-06
 
 ### Added

db/data/20240713103122_make_first_user_admin.rb

@@ -3,11 +3,11 @@
 class MakeFirstUserAdmin < ActiveRecord::Migration[7.1]
   def up
     user = User.first
-    user.update!(admin: true)
+    user&.update!(admin: true)
   end
 
   def down
     user = User.first
-    user.update!(admin: false)
+    user&.update!(admin: false)
   end
 end