Redmine

• Project hierarchy:
  

  PR1 (with issue tracking enabled and activated several trackers)
     PR1_C1 (with issue tracking enabled and none trackers activated)
  

• Issue, defined in PR1, assigned a tracker

• Move the issue from PR1 to PR1_C1.

Result:
Internal error.

Started PUT "/issues/2885" for 192.168.xxx.xxx at 2015-07-30 12:40:54 +0300
Processing by IssuesController#update as HTML
  Parameters: {"utf8"=>"✓", "authenticity_token"=>"9bqERxUbYbjA8eewrwerwwefH6kQGImlUcm5IgKc6wkY=", "issue"=>{"is_private"=>"0", "project_id"=>"383", "subject"=>"xxxxxxxxxxxxxxxxx", "description"=>"xxxxxxxxxxxxxxxxxxx", "status_id"=>"2", "priority_id"=>"4", "assigned_to_id"=>"3", "parent_issue_id"=>"", "start_date"=>"2015-06-10", "due_date"=>"", "estimated_hours"=>"", "done_ratio"=>"0", "custom_field_values"=>{"2"=>[""], "3"=>[""], "4"=>[""]}, "checklists_attributes"=>{"0"=>{"is_done"=>"0", "subject"=>"", "_destroy"=>"false", "position"=>"1", "id"=>""}}, "notes"=>"", "private_notes"=>"0", "lock_version"=>"4"}, "time_entry"=>{"hours"=>"", "activity_id"=>"13", "comments"=>""}, "last_journal_id"=>"11173", "commit"=>"Изпращане", "id"=>"2885"}
  Current user: xxx (id=3)
  Rendered issues/edit.html.erb within layouts/base (31.2ms)
Completed 500 Internal Server Error in 109.4ms

ActionView::Template::Error (undefined method `name' for nil:NilClass):
    1: <h2><%=h "#{@issue.tracker.name} ##{@issue.id}" %></h2>
    2: 
    3: <%= render :partial => 'edit' %>
    4: <% content_for :header_tags do %>
  app/views/issues/edit.html.erb:1:in `_app_views_issues_edit_html_erb__803754913_24533328'
  app/controllers/issues_controller.rb:207:in `block (2 levels) in update'
  app/controllers/issues_controller.rb:206:in `update'