StandardError: An error has occurred, this and all later migrations canceled: The single-table inheritance mechanism failed to locate the subclass: 'Spree::BillingIntegration::PaypalExpress'. This error is raised because the column 'type' is reserved for

[christoph-buente]

Check full details on Airbrake: #71025180

Backtrace:

```
[PROJECT_ROOT]/vendor/bundle/ruby/2.1.0/gems/activerecord-3.2.16/lib/active_record/inheritance.rb:143:in rescue in find_sti_class
[PROJECT_ROOT]/vendor/bundle/ruby/2.1.0/gems/activerecord-3.2.16/lib/active_record/inheritance.rb:136:in find_sti_class
[PROJECT_ROOT]/vendor/bundle/ruby/2.1.0/gems/activerecord-3.2.16/lib/active_record/inheritance.rb:62:in instantiate
[PROJECT_ROOT]/vendor/bundle/ruby/2.1.0/gems/activerecord-3.2.16/lib/active_record/querying.rb:38:in block (2 levels) in find_by_sql
[PROJECT_ROOT]/vendor/bundle/ruby/2.1.0/gems/activerecord-3.2.16/lib/active_record/querying.rb:38:in collect!
[PROJECT_ROOT]/vendor/bundle/ruby/2.1.0/gems/activerecord-3.2.16/lib/active_record/querying.rb:38:in block in find_by_sql
[PROJECT_ROOT]/vendor/bundle/ruby/2.1.0/gems/activerecord-3.2.16/lib/active_record/explain.rb:41:in logging_query_plan
[PROJECT_ROOT]/vendor/bundle/ruby/2.1.0/gems/activerecord-3.2.16/lib/active_record/querying.rb:37:in find_by_sql
[PROJECT_ROOT]/vendor/bundle/ruby/2.1.0/gems/activerecord-3.2.16/lib/active_record/relation.rb:171:in exec_queries
[PROJECT_ROOT]/vendor/bundle/ruby/2.1.0/gems/activerecord-3.2.16/lib/active_record/relation.rb:160:in block in to_a
[PROJECT_ROOT]/vendor/bundle/ruby/2.1.0/gems/activerecord-3.2.16/lib/active_record/explain.rb:41:in logging_query_plan
[PROJECT_ROOT]/vendor/bundle/ruby/2.1.0/gems/activerecord-3.2.16/lib/active_record/relation.rb:159:in to_a
[PROJECT_ROOT]/vendor/bundle/ruby/2.1.0/gems/activerecord-3.2.16/lib/active_record/relation.rb:189:in exec_queries
[PROJECT_ROOT]/vendor/bundle/ruby/2.1.0/gems/activerecord-3.2.16/lib/active_record/relation.rb:160:in block in to_a
[PROJECT_ROOT]/vendor/bundle/ruby/2.1.0/gems/activerecord-3.2.16/lib/active_record/explain.rb:41:in logging_query_plan
[PROJECT_ROOT]/vendor/bundle/ruby/2.1.0/gems/activerecord-3.2.16/lib/active_record/relation.rb:159:in to_a
[PROJECT_ROOT]/vendor/bundle/ruby/2.1.0/gems/activerecord-3.2.16/lib/active_record/relation.rb:355:in destroy_all
[PROJECT_ROOT]/db/migrate/20131216122905_remove_old_paypal_information.rb:3:in up
[PROJECT_ROOT]/vendor/bundle/ruby/2.1.0/gems/activerecord-3.2.16/lib/active_record/migration.rb:410:in block (2 levels) in migrate
/opt/rbenv/versions/2.1.0/lib/ruby/2.1.0/benchmark.rb:279:in measure
[PROJECT_ROOT]/vendor/bundle/ruby/2.1.0/gems/activerecord-3.2.16/lib/active_record/migration.rb:410:in block in migrate
[PROJECT_ROOT]/vendor/bundle/ruby/2.1.0/gems/activerecord-3.2.16/lib/active_record/connection_adapters/abstract/connection_pool.rb:129:in with_connection
[PROJECT_ROOT]/vendor/bundle/ruby/2.1.0/gems/activerecord-3.2.16/lib/active_record/migration.rb:389:in migrate
[PROJECT_ROOT]/vendor/bundle/ruby/2.1.0/gems/activerecord-3.2.16/lib/active_record/migration.rb:528:in migrate
[PROJECT_ROOT]/vendor/bundle/ruby/2.1.0/gems/activerecord-3.2.16/lib/active_record/migration.rb:720:in block (2 levels) in migrate
[PROJECT_ROOT]/vendor/bundle/ruby/2.1.0/gems/activerecord-3.2.16/lib/active_record/migration.rb:775:in call
[PROJECT_ROOT]/vendor/bundle/ruby/2.1.0/gems/activerecord-3.2.16/lib/active_record/migration.rb:775:in block in ddl_transaction
[PROJECT_ROOT]/vendor/bundle/ruby/2.1.0/gems/activerecord-3.2.16/lib/active_record/connection_adapters/abstract/database_statements.rb:192:in transaction
[PROJECT_ROOT]/vendor/bundle/ruby/2.1.0/gems/activerecord-3.2.16/lib/active_record/transactions.rb:208:in transaction
[PROJECT_ROOT]/vendor/bundle/ruby/2.1.0/gems/activerecord-3.2.16/lib/active_record/migration.rb:775:in ddl_transaction
[PROJECT_ROOT]/vendor/bundle/ruby/2.1.0/gems/activerecord-3.2.16/lib/active_record/migration.rb:719:in block in migrate
[PROJECT_ROOT]/vendor/bundle/ruby/2.1.0/gems/activerecord-3.2.16/lib/active_record/migration.rb:700:in each
[PROJECT_ROOT]/vendor/bundle/ruby/2.1.0/gems/activerecord-3.2.16/lib/active_record/migration.rb:700:in migrate
[PROJECT_ROOT]/vendor/bundle/ruby/2.1.0/gems/activerecord-3.2.16/lib/active_record/migration.rb:570:in up
[PROJECT_ROOT]/vendor/bundle/ruby/2.1.0/gems/activerecord-3.2.16/lib/active_record/migration.rb:551:in migrate
[PROJECT_ROOT]/vendor/bundle/ruby/2.1.0/gems/activerecord-3.2.16/lib/active_record/railties/databases.rake:193:in block (2 levels) in <top (required)>
[PROJECT_ROOT]/vendor/bundle/ruby/2.1.0/gems/rake-10.1.1/lib/rake/task.rb:236:in call
[PROJECT_ROOT]/vendor/bundle/ruby/2.1.0/gems/rake-10.1.1/lib/rake/task.rb:236:in block in execute
[PROJECT_ROOT]/vendor/bundle/ruby/2.1.0/gems/rake-10.1.1/lib/rake/task.rb:231:in each
[PROJECT_ROOT]/vendor/bundle/ruby/2.1.0/gems/rake-10.1.1/lib/rake/task.rb:231:in execute
[PROJECT_ROOT]/vendor/bundle/ruby/2.1.0/gems/rake-10.1.1/lib/rake/task.rb:175:in block in invoke_with_call_chain
/opt/rbenv/versions/2.1.0/lib/ruby/2.1.0/monitor.rb:211:in mon_synchronize
[PROJECT_ROOT]/vendor/bundle/ruby/2.1.0/gems/rake-10.1.1/lib/rake/task.rb:168:in invoke_with_call_chain
[PROJECT_ROOT]/vendor/bundle/ruby/2.1.0/gems/rake-10.1.1/lib/rake/task.rb:161:in invoke
[PROJECT_ROOT]/vendor/bundle/ruby/2.1.0/gems/rake-10.1.1/lib/rake/application.rb:149:in invoke_task
[PROJECT_ROOT]/vendor/bundle/ruby/2.1.0/gems/rake-10.1.1/lib/rake/application.rb:106:in block (2 levels) in top_level
[PROJECT_ROOT]/vendor/bundle/ruby/2.1.0/gems/rake-10.1.1/lib/rake/application.rb:106:in each
[PROJECT_ROOT]/vendor/bundle/ruby/2.1.0/gems/rake-10.1.1/lib/rake/application.rb:106:in block in top_level
[PROJECT_ROOT]/vendor/bundle/ruby/2.1.0/gems/rake-10.1.1/lib/rake/application.rb:115:in run_with_threads
[PROJECT_ROOT]/vendor/bundle/ruby/2.1.0/gems/rake-10.1.1/lib/rake/application.rb:100:in top_level
[PROJECT_ROOT]/vendor/bundle/ruby/2.1.0/gems/rake-10.1.1/lib/rake/application.rb:78:in block in run
[PROJECT_ROOT]/vendor/bundle/ruby/2.1.0/gems/rake-10.1.1/lib/rake/application.rb:165:in standard_exception_handling
[PROJECT_ROOT]/vendor/bundle/ruby/2.1.0/gems/rake-10.1.1/lib/rake/application.rb:75:in run
[PROJECT_ROOT]/vendor/bundle/ruby/2.1.0/gems/rake-10.1.1/bin/rake:33:in <top (required)>
[PROJECT_ROOT]/vendor/bundle/ruby/2.1.0/bin/rake:23:in load
[PROJECT_ROOT]/vendor/bundle/ruby/2.1.0/bin/rake:23:in <main>
```