gistfile1.rb

# The following is the example of how I corrected the piggyback registrations associated to the user Nathan Archuleta 
# with rm_user_id 187181 for the event with id 24521

reg_complete=EventRegistration.first(:conditions => { :event_id => 24521,:rm_user_id => 187181,:processed => true }) # find the parent and complete registration
EventRegistration.where(:event_id => 24521,:rm_user_id => 187181,:invoice_code => nil, :cost => nil, :service_fee => nil, :payment_notes => nil).each do |incomplete| # find the incomplete registrations and iterate over them
  puts "CORRECTING EVENT REGISTRATION #{ incomplete.id }"
  incomplete.processed = reg_complete.processed # update the processed field of the incomplete registration and set the processed value of the complete registration
  incomplete.status =  reg_complete.status # update the status field of the incomplete registration and set the status value of the complete registration
  incomplete.cost =  reg_complete.cost # update the cost field of the incomplete registration and set the cost value of the complete registration
  incomplete.service_fee =  reg_complete.service_fee # update the service_fee field of the incomplete registration and set the service_fee value of the complete registration
  incomplete.club_team =  reg_complete.club_team # update the club_team field of the incomplete registration and set the club_team value of the complete registration
  incomplete.team_type =  reg_complete.team_type # update the team_type field of the incomplete registration and set the team_type value of the complete registration
  incomplete.team_id =  reg_complete.team_id # update the team_id field of the incomplete registration and set the team_id value of the complete registration
  incomplete.save # save changes made in the incomplete registration
end

Step 2 - fixing problematic piggyback registrations