Foreman-debug output:
HOSTNAME: olympic.it.liu.se
OS: redhat
RELEASE: CentOS release 6.7 (Final)
FOREMAN: 1.10.2
RUBY: ruby 1.8.7 (2013-06-27 patchlevel 374) [x86_64-linux]
PUPPET: 3.8.6
DENIALS: 0

Expected result:
foreman-rake fix_cached_counters works its way through the foreman database and cleans up the statistics.

Actual result:

[root@olympic ~]# foreman-rake fix_cached_counters -t

• Invoke fix_cached_counters (first_time)
• Invoke environment (first_time)
• Execute environment
• Execute fix_cached_counters
  Correcting cached counters: (this may take a few minutes)
  Architecture corrected
  Environment corrected
  Operatingsystem corrected
  rake aborted!
  undefined method `counter_cache_column' for nil:NilClass
  /opt/rh/ruby193/root/usr/share/gems/gems/activerecord-3.2.8/lib/active_record/counter_cache.rb:32:in `block in reset_counters'
  /opt/rh/ruby193/root/usr/share/gems/gems/activerecord-3.2.8/lib/active_record/counter_cache.rb:19:in `each'
  /opt/rh/ruby193/root/usr/share/gems/gems/activerecord-3.2.8/lib/active_record/counter_cache.rb:19:in `reset_counters'
  /usr/share/foreman/lib/tasks/fix_cached_counters.rake:5:in `block (3 levels) in <top (required)>'
  /usr/share/foreman/lib/tasks/fix_cached_counters.rake:5:in `each'
  /usr/share/foreman/lib/tasks/fix_cached_counters.rake:5:in `block (2 levels) in <top (required)>'
  /usr/share/foreman/lib/tasks/fix_cached_counters.rake:4:in `each'
  /usr/share/foreman/lib/tasks/fix_cached_counters.rake:4:in `block in <top (required)>'
  /opt/rh/ruby193/root/usr/share/ruby/rake/task.rb:205:in `call'
  /opt/rh/ruby193/root/usr/share/ruby/rake/task.rb:205:in `block in execute'
  /opt/rh/ruby193/root/usr/share/ruby/rake/task.rb:200:in `each'
  /opt/rh/ruby193/root/usr/share/ruby/rake/task.rb:200:in `execute'
  /opt/rh/ruby193/root/usr/share/ruby/rake/task.rb:158:in `block in invoke_with_call_chain'
  /opt/rh/ruby193/root/usr/share/ruby/monitor.rb:211:in `mon_synchronize'
  /opt/rh/ruby193/root/usr/share/ruby/rake/task.rb:151:in `invoke_with_call_chain'
  /opt/rh/ruby193/root/usr/share/ruby/rake/task.rb:144:in `invoke'
  /opt/rh/ruby193/root/usr/share/ruby/rake/application.rb:116:in `invoke_task'
  /opt/rh/ruby193/root/usr/share/ruby/rake/application.rb:94:in `block (2 levels) in top_level'
  /opt/rh/ruby193/root/usr/share/ruby/rake/application.rb:94:in `each'
  /opt/rh/ruby193/root/usr/share/ruby/rake/application.rb:94:in `block in top_level'
  /opt/rh/ruby193/root/usr/share/ruby/rake/application.rb:133:in `standard_exception_handling'
  /opt/rh/ruby193/root/usr/share/ruby/rake/application.rb:88:in `top_level'
  /opt/rh/ruby193/root/usr/share/ruby/rake/application.rb:66:in `block in run'
  /opt/rh/ruby193/root/usr/share/ruby/rake/application.rb:133:in `standard_exception_handling'
  /opt/rh/ruby193/root/usr/share/ruby/rake/application.rb:63:in `run'
  /opt/rh/ruby193/root/usr/bin/rake:32:in `<main>'
  Tasks: TOP => fix_cached_counters
  [root@olympic ~]#