Satellite6 - Upgrade to 6.7 fails while starting foreman-proxy.service

If you are using the external dhcp with satellite 6, the upgrade might fail at starting the foreman-proxy service again with this error:

 Apr 16 14:44:55 satellite.example.com[11733]: /usr/share/foreman-proxy/Gemfile.in:12:in `instance_eval': You cannot specify the same gem twice with different version requirements. (Bundler::GemfileError)  
 Apr 16 14:44:55 satellite.example.com[11733]: You specified: rsec (< 1) and rsec (>= 0)  

There are two workarounds to this problem. The first solution is editing the file /usr/share/foreman-proxy/bundler.d/dhcp_remote_isc.rb and add the '<1' to the gem 'rsec' line

 [root@satellite ~]# vim /usr/share/foreman-proxy/bundler.d/dhcp_remote_isc.rb  

 group :dhcp_remote_isc do  
  gem 'rsec', '<1'  
 end  
 gem 'smart_proxy_dhcp_remote_isc'  

The second solution would be to remove the '<1' from each gem 'rsec' line

 [root@satellite ~]# vim /usr/share/foreman-proxy/bundler.d/dhcp_isc.rb  

 group :dhcp_isc_inotify do  
  gem 'rsec'  
  if RUBY_VERSION < '2.2'  
   gem 'rb-inotify', '< 0.10'  
  else  
   gem 'rb-inotify'  
  end  
 end  
 group :dhcp_isc_kqueue do  
  gem 'rsec'  
  gem 'rb-kqueue'  
 end  

I prefer the first method but both of them should work fine.

Feel free to comment and / or suggest a topic.