Redmine

Accesing to Administration -> LDAP authentication -> My Ldap Organization i get next error:

Started GET "/auth_sources/1/edit" for 81.43.32.194 at 2017-07-28 08:26:00 +0200
Processing by AuthSourcesController#edit as HTML
  Parameters: {"id"=>"1"}
  Current user: agalisteo (id=35)
  Rendered auth_sources/_form_auth_source_ldap.html.erb (30.2ms)
  Rendered auth_sources/edit.html.erb within layouts/admin (31.6ms)
Completed 500 Internal Server Error in 175ms (ActiveRecord: 133.0ms)

ActionView::Template::Error (private method `timeout' called for #<AuthSourceLdap:0x005567abbf4128>
Did you mean?  timeout=
               timeout?):
    12:            :onchange => "this.name='auth_source[account_password]';" %></p>
    13:   <p><%= f.text_field :base_dn, :required => true, :size => 60 %></p>
    14:   <p><%= f.text_area :filter, :size => 60, :label => :field_auth_source_ldap_filter %></p>
    15:   <p><%= f.text_field :timeout, :size => 4 %></p>
    16:   <p><%= f.check_box :onthefly_register, :label => :field_onthefly %></p>
    17: </div>
    18: 
  lib/redmine/views/labelled_form_builder.rb:31:in `text_field'
  app/views/auth_sources/_form_auth_source_ldap.html.erb:15:in `_app_views_auth_sources__form_auth_source_ldap_html_erb___2279895477480212392_46951877349980'
  app/views/auth_sources/edit.html.erb:4:in `block in _app_views_auth_sources_edit_html_erb___2140026764370812182_46951877567740'
  app/helpers/application_helper.rb:1051:in `labelled_form_for'
  app/views/auth_sources/edit.html.erb:3:in `_app_views_auth_sources_edit_html_erb___2140026764370812182_46951877567740'
  lib/redmine/sudo_mode.rb:63:in `sudo_mode'

My environment:

Environment:
  Redmine version                3.3.3.stable
  Ruby version                   2.3.1-p112 (2016-04-26) [x86_64-linux]
  Rails version                  4.2.7.1
  Environment                    production
  Database adapter               PostgreSQL
SCM:
  Git                            2.7.4
  Filesystem                     
Redmine plugins:
  redmine_agile                  1.4.1
  redmine_backlogs               v1.0.6
  redmine_checklists             3.1.5
  redmine_contacts               4.0.4
  redmine_contacts_helpdesk      3.0.4
  redmine_contacts_invoices      4.1.1
  redmine_finance                2.1.1
  redmine_people                 1.2.0
  redmine_products               2.0.1