Fixed migration.

db/migrate/20160817000002_update_setting_cti.rb

@@ -1,5 +1,8 @@
 class UpdateSettingCti < ActiveRecord::Migration
   def up
+    # return if it's a new setup
+    return if !Setting.find_by(name: 'system_init_done')
+
     setting = Setting.find_by(name: 'sipgate_integration')
     setting.frontend = true
     setting.preferences[:authentication] = true