Why does deleting actions for Provisioning templates fail in Red Hat Satellite 6?

Issue

• When trying to delete Provisioning templates from webui below error is noticed in /var/log/forman/production.log file.

  Processing by ConfigTemplatesController#destroy as HTML
   Parameters: {"authenticity_token"=>"MP4ic7sJPojDLT6DLxEnIx85dSk68KE4XXSlyWLfL/Y=", "id"=>"41-test"}
  Failed to save:
  Redirected to https://satellite.example.com/config_templates
  Completed 302 Found in 66ms (ActiveRecord: 11.4ms)
  Processing by ConfigTemplatesController#index as HTML
   Rendered config_templates/index.html.erb within layouts/application (258.5ms)
   Rendered common/_searchbar.html.erb (2.7ms)
   Rendered home/_submenu.html.erb (3.8ms)
   Rendered home/_user_dropdown.html.erb (1.4ms)
  Read fragment views/tabs_and_title_records-3 (0.1ms)
   Rendered home/_topbar.html.erb (6.3ms)
   Rendered layouts/base.html.erb (7.5ms)
  Completed 200 OK in 296ms (Views: 267.6ms | ActiveRecord: 6.9ms)
  

• hammer command fails to delete Provisioning templates on Red Hat Satellite 6 with Internal Server Error.

  # hammer -v -u admin -p password template delete --id=template-id
  [ERROR 2014-09-17 07:37:21 API] 500 Internal Server Error
  {
     "error" => {
         "message" => "resource have no errors"
     }
  }
  [ERROR 2014-09-17 07:37:21 Exception] resource have no errors
  Could not delete the config template:
   resource have no errors
  [ERROR 2014-09-17 07:37:21 Exception] 
  
  RestClient::InternalServerError (500 Internal Server Error):
     /usr/share/gems/gems/rest-client-1.6.7/lib/restclient/abstract_response.rb:48:in `return!'
     /usr/share/gems/gems/rest-client-1.6.7/lib/restclient/request.rb:230:in `process_result'
     /usr/share/gems/gems/rest-client-1.6.7/lib/restclient/request.rb:178:in `block in transmit'
     /usr/share/ruby/net/http.rb:852:in `start'
    [...]
  

NOTE: Replace the satellite.example.com with correct & complete Red Hat Satellite 6 fully qualified domain name [FQDN].