Hi,
Today I add existing host to foreman which I can see this host show on the foreman dashboard. But when I edit the host on any entry I can't submit any change, it show the error at the field "Name" as invalid.

Here is the production.log

Started PUT "/hosts/tt2-ralph" for at 2014-05-09 11:26:10 +0700
Processing by HostsController#update as */*
Parameters: {"utf8"=>"✓", "authenticity_token"=>"xAJilYtqRc0ZoFlAhPhDCnm5tiWOtBzAfxgeo8aJNIs=", "host"=>{"name"=>"tt2-ralph", "hostgroup_id"=>"", "environment_id"=>"1", "puppet_ca_proxy_id"=>"1", "puppet_proxy_id"=>"1", "puppetclass_ids"=>[""], "managed"=>"f", "progress_report_id"=>"[FILTERED]", "is_owned_by"=>"1-Users", "enabled"=>"1", "model_id"=>"1", "comment"=>"", "overwrite"=>"false"}, "id"=>"tt2-ralph"}
Failed to save: Name is invalid
Rendered hosts/_progress.html.erb (0.2ms)
Rendered puppetclasses/_selectedClasses.html.erb (0.0ms)
Rendered puppetclasses/_classes_in_groups.html.erb (0.0ms)
Rendered puppetclasses/_classes.html.erb (5.0ms)
Rendered puppetclasses/_class_selection.html.erb (35.0ms)
Rendered puppetclasses/_class_parameters.html.erb (0.0ms)
Rendered puppetclasses/_classes_parameters.html.erb (11.1ms)
Rendered common_parameters/_inherited_parameters.html.erb (0.4ms)
Rendered common_parameters/_puppetclass_parameter.html.erb (4.5ms)
Rendered common_parameters/_puppetclasses_parameters.html.erb (7.1ms)
Rendered common_parameters/_parameter.html.erb (2.8ms)
Rendered common_parameters/_parameters.html.erb (8.2ms)
Rendered hosts/_form.html.erb (118.7ms)
Rendered hosts/edit.html.erb within layouts/application (122.2ms)
Rendered home/_user_dropdown.html.erb (2.5ms)
Read fragment views/tabs_and_title_records-1 (0.2ms)
Rendered home/_topbar.html.erb (4.3ms)
Rendered layouts/base.html.erb (6.9ms)
Completed 200 OK in 197ms (Views: 119.4ms | ActiveRecord: 23.9ms)

1. rpm -qa|grep -i foreman
   ruby193-rubygem-foreman_bootdisk-2.0.5-1.el6.noarch
   ruby193-rubygem-foreman_setup-2.0.3-1.el6.noarch
   foreman-proxy-1.5.0-0.2.RC2.el6.noarch
   foreman-postgresql-1.5.0-0.2.RC2.el6.noarch
   rubygem-foreman_api-0.1.11-1.el6.noarch
   foreman-1.5.0-0.2.RC2.el6.noarch
   foreman-release-1.5.0-0.2.RC2.el6.noarch
   foreman-installer-1.5.0-0.2.RC2.el6.noarch

1. rpm -qa|grep -i puppet
   puppet-3.5.1-1.el6.noarch
   puppet-server-3.5.1-1.el6.noarch

I add this host to the foreman by add the line server=<myforemanserver> at the puppet.conf and run puppet agent --test.
Also start the puppet agent on the client.

Regards,
Kan