Friendly Id bug with globalize

gistfile1.rb

# Activate the gem you are reporting the issue against.
gem 'activerecord', '3.2.19'
gem 'friendly_id', '4.0.10.1'
gem 'globalize', '3.0.4'
gem 'i18n'

require 'active_record'
require 'friendly_id'
require 'globalize'
require 'minitest/autorun'
require 'logger'
require 'i18n'

# Ensure backward compatibility with Minitest 4
Minitest::Test = MiniTest::Unit::TestCase unless defined?(Minitest::Test)

# This connection will do for database-independent bug reports.
ActiveRecord::Base.establish_connection(adapter: 'sqlite3', database: ':memory:')
ActiveRecord::Base.logger = Logger.new(STDOUT)

ActiveRecord::Schema.define do
  create_table "page_translations", :force => true do |t|
    t.integer  "page_id"
    t.string   "locale"
    t.string   "title"
    t.string   "slug"
  end

  add_index "page_translations", ["locale"], :name => "index_page_translations_on_locale"
  add_index "page_translations", ["page_id"], :name => "index_page_translations_on_page_id"
  add_index "page_translations", ["slug", "locale"], :name => "index_page_translations_on_slug_and_locale", :unique => true

  create_table :pages do |t|
    t.string   "title"
    t.string   "slug"
  end
end

class Page < ActiveRecord::Base
  extend FriendlyId

  translates :title, :slug

  friendly_id :title, use: [:globalize]

  validates :slug, uniqueness: true
end

class BugTest < Minitest::Test
  def test_translated
    page_1 = Page.create! title: 'Star Wars'
    page_2 = Page.create! title: 'Star Wars'
    assert_equal true, page_2.valid?

    I18n.with_locale(:it) do
      page_1.update_attributes title: 'Guerre Stellari'
      page_2.update_attributes title: 'Guerre Stellari'
      assert_equal true, page_2.valid?
    end
  end
end