After upgrading to 2.0.1, TFM just prints that error message when accessing the webpage.

I just updated the system using "yum update" after seeing that message, i did a foreman-rake db:migrate which prints the following stack trace:

20140522185700 ChangeTemplatekindToBootdisk: migrating ===================
rake aborted!
StandardError: An error has occurred, this and all later migrations canceled:

Invalid single-table inheritance type: ProvisioningTemplate is not a subclass of ChangeTemplatekindToBootdisk::FakeConfigTemplate
/opt/theforeman/tfm/root/usr/share/gems/gems/activerecord-5.2.1/lib/active_record/inheritance.rb:233:in `find_sti_class'
/opt/theforeman/tfm/root/usr/share/gems/gems/activerecord-5.2.1/lib/active_record/inheritance.rb:207:in `discriminate_class_for_record'
/opt/theforeman/tfm/root/usr/share/gems/gems/activerecord-5.2.1/lib/active_record/persistence.rb:69:in `instantiate'
/opt/theforeman/tfm/root/usr/share/gems/gems/activerecord-5.2.1/lib/active_record/querying.rb:52:in `block (2 levels) in find_by_sql'
/opt/theforeman/tfm/root/usr/share/gems/gems/activerecord-5.2.1/lib/active_record/result.rb:57:in `block in each'
/opt/theforeman/tfm/root/usr/share/gems/gems/activerecord-5.2.1/lib/active_record/result.rb:57:in `each'
/opt/theforeman/tfm/root/usr/share/gems/gems/activerecord-5.2.1/lib/active_record/result.rb:57:in `each'
/opt/theforeman/tfm/root/usr/share/gems/gems/activerecord-5.2.1/lib/active_record/querying.rb:52:in `map'
/opt/theforeman/tfm/root/usr/share/gems/gems/activerecord-5.2.1/lib/active_record/querying.rb:52:in `block in find_by_sql'
/opt/theforeman/tfm/root/usr/share/gems/gems/activesupport-5.2.1/lib/active_support/notifications/instrumenter.rb:23:in `instrument'
/opt/theforeman/tfm/root/usr/share/gems/gems/activerecord-5.2.1/lib/active_record/querying.rb:51:in `find_by_sql'
/opt/theforeman/tfm/root/usr/share/gems/gems/activerecord-5.2.1/lib/active_record/relation.rb:554:in `block in exec_queries'
/opt/theforeman/tfm/root/usr/share/gems/gems/activerecord-5.2.1/lib/active_record/relation.rb:578:in `skip_query_cache_if_necessary'
/opt/theforeman/tfm/root/usr/share/gems/gems/activerecord-5.2.1/lib/active_record/relation.rb:541:in `exec_queries'
/opt/theforeman/tfm/root/usr/share/gems/gems/activerecord-5.2.1/lib/active_record/relation.rb:414:in `load'
/opt/theforeman/tfm/root/usr/share/gems/gems/activerecord-5.2.1/lib/active_record/relation.rb:200:in `records'
/opt/theforeman/tfm/root/usr/share/gems/gems/activerecord-5.2.1/lib/active_record/relation/delegation.rb:41:in `|'
/opt/theforeman/tfm/root/usr/share/gems/gems/foreman_bootdisk-16.0.0/db/migrate/20140522185700_change_templatekind_to_bootdisk.rb:18:in `up'
/opt/theforeman/tfm/root/usr/share/gems/gems/activerecord-5.2.1/lib/active_record/migration.rb:777:in `up'
/opt/theforeman/tfm/root/usr/share/gems/gems/activerecord-5.2.1/lib/active_record/migration.rb:817:in `exec_migration'
/opt/theforeman/tfm/root/usr/share/gems/gems/activerecord-5.2.1/lib/active_record/migration.rb:798:in `block (2 levels) in migrate'
/opt/theforeman/tfm/root/usr/share/gems/gems/activerecord-5.2.1/lib/active_record/migration.rb:797:in `block in migrate'
/opt/theforeman/tfm/root/usr/share/gems/gems/activerecord-5.2.1/lib/active_record/connection_adapters/abstract/connection_pool.rb:414:in `with_connection'
/opt/theforeman/tfm/root/usr/share/gems/gems/activerecord-5.2.1/lib/active_record/migration.rb:796:in `migrate'
/opt/theforeman/tfm/root/usr/share/gems/gems/activerecord-5.2.1/lib/active_record/migration.rb:977:in `migrate'
/opt/theforeman/tfm/root/usr/share/gems/gems/activerecord-5.2.1/lib/active_record/migration.rb:1292:in `block in execute_migration_in_transaction'
/opt/theforeman/tfm/root/usr/share/gems/gems/activerecord-5.2.1/lib/active_record/migration.rb:1343:in `block in ddl_transaction'
/opt/theforeman/tfm/root/usr/share/gems/gems/activerecord-5.2.1/lib/active_record/connection_adapters/abstract/database_statements.rb:254:in `block in transaction'
/opt/theforeman/tfm/root/usr/share/gems/gems/activerecord-5.2.1/lib/active_record/connection_adapters/abstract/transaction.rb:239:in `block in within_new_transaction'
/opt/theforeman/tfm/root/usr/share/gems/gems/activerecord-5.2.1/lib/active_record/connection_adapters/abstract/transaction.rb:236:in `within_new_transaction'
/opt/theforeman/tfm/root/usr/share/gems/gems/activerecord-5.2.1/lib/active_record/connection_adapters/abstract/database_statements.rb:254:in `transaction'
/opt/theforeman/tfm/root/usr/share/gems/gems/activerecord-5.2.1/lib/active_record/transactions.rb:212:in `transaction'
/opt/theforeman/tfm/root/usr/share/gems/gems/activerecord-5.2.1/lib/active_record/migration.rb:1343:in `ddl_transaction'
/opt/theforeman/tfm/root/usr/share/gems/gems/activerecord-5.2.1/lib/active_record/migration.rb:1291:in `execute_migration_in_transaction'
/opt/theforeman/tfm/root/usr/share/gems/gems/activerecord-5.2.1/lib/active_record/migration.rb:1263:in `block in migrate_without_lock'
/opt/theforeman/tfm/root/usr/share/gems/gems/activerecord-5.2.1/lib/active_record/migration.rb:1262:in `each'
/opt/theforeman/tfm/root/usr/share/gems/gems/activerecord-5.2.1/lib/active_record/migration.rb:1262:in `migrate_without_lock'
/opt/theforeman/tfm/root/usr/share/gems/gems/activerecord-5.2.1/lib/active_record/migration.rb:1210:in `block in migrate'
/opt/theforeman/tfm/root/usr/share/gems/gems/activerecord-5.2.1/lib/active_record/migration.rb:1363:in `with_advisory_lock'
/opt/theforeman/tfm/root/usr/share/gems/gems/activerecord-5.2.1/lib/active_record/migration.rb:1210:in `migrate'
/opt/theforeman/tfm/root/usr/share/gems/gems/activerecord-5.2.1/lib/active_record/migration.rb:1036:in `up'
/opt/theforeman/tfm/root/usr/share/gems/gems/activerecord-5.2.1/lib/active_record/migration.rb:1011:in `migrate'
/opt/theforeman/tfm/root/usr/share/gems/gems/activerecord-5.2.1/lib/active_record/tasks/database_tasks.rb:172:in `migrate'
/opt/theforeman/tfm/root/usr/share/gems/gems/activerecord-5.2.1/lib/active_record/railties/databases.rake:60:in `block (2 levels) in <top (required)>'
/opt/rh/rh-ruby25/root/usr/share/gems/gems/rake-12.3.0/exe/rake:27:in `<top (required)>'

Caused by:
ActiveRecord::SubclassNotFound: Invalid single-table inheritance type: ProvisioningTemplate is not a subclass of ChangeTemplatekindToBootdisk::FakeConfigTemplate
/opt/theforeman/tfm/root/usr/share/gems/gems/activerecord-5.2.1/lib/active_record/inheritance.rb:233:in `find_sti_class'
/opt/theforeman/tfm/root/usr/share/gems/gems/activerecord-5.2.1/lib/active_record/inheritance.rb:207:in `discriminate_class_for_record'
/opt/theforeman/tfm/root/usr/share/gems/gems/activerecord-5.2.1/lib/active_record/persistence.rb:69:in `instantiate'
/opt/theforeman/tfm/root/usr/share/gems/gems/activerecord-5.2.1/lib/active_record/querying.rb:52:in `block (2 levels) in find_by_sql'
/opt/theforeman/tfm/root/usr/share/gems/gems/activerecord-5.2.1/lib/active_record/result.rb:57:in `block in each'
/opt/theforeman/tfm/root/usr/share/gems/gems/activerecord-5.2.1/lib/active_record/result.rb:57:in `each'
/opt/theforeman/tfm/root/usr/share/gems/gems/activerecord-5.2.1/lib/active_record/result.rb:57:in `each'
/opt/theforeman/tfm/root/usr/share/gems/gems/activerecord-5.2.1/lib/active_record/querying.rb:52:in `map'
/opt/theforeman/tfm/root/usr/share/gems/gems/activerecord-5.2.1/lib/active_record/querying.rb:52:in `block in find_by_sql'
/opt/theforeman/tfm/root/usr/share/gems/gems/activesupport-5.2.1/lib/active_support/notifications/instrumenter.rb:23:in `instrument'
/opt/theforeman/tfm/root/usr/share/gems/gems/activerecord-5.2.1/lib/active_record/querying.rb:51:in `find_by_sql'
/opt/theforeman/tfm/root/usr/share/gems/gems/activerecord-5.2.1/lib/active_record/relation.rb:554:in `block in exec_queries'
/opt/theforeman/tfm/root/usr/share/gems/gems/activerecord-5.2.1/lib/active_record/relation.rb:578:in `skip_query_cache_if_necessary'
/opt/theforeman/tfm/root/usr/share/gems/gems/activerecord-5.2.1/lib/active_record/relation.rb:541:in `exec_queries'
/opt/theforeman/tfm/root/usr/share/gems/gems/activerecord-5.2.1/lib/active_record/relation.rb:414:in `load'
/opt/theforeman/tfm/root/usr/share/gems/gems/activerecord-5.2.1/lib/active_record/relation.rb:200:in `records'
/opt/theforeman/tfm/root/usr/share/gems/gems/activerecord-5.2.1/lib/active_record/relation/delegation.rb:41:in `|'
/opt/theforeman/tfm/root/usr/share/gems/gems/foreman_bootdisk-16.0.0/db/migrate/20140522185700_change_templatekind_to_bootdisk.rb:18:in `up'
/opt/theforeman/tfm/root/usr/share/gems/gems/activerecord-5.2.1/lib/active_record/migration.rb:777:in `up'
/opt/theforeman/tfm/root/usr/share/gems/gems/activerecord-5.2.1/lib/active_record/migration.rb:817:in `exec_migration'
/opt/theforeman/tfm/root/usr/share/gems/gems/activerecord-5.2.1/lib/active_record/migration.rb:798:in `block (2 levels) in migrate'
/opt/theforeman/tfm/root/usr/share/gems/gems/activerecord-5.2.1/lib/active_record/migration.rb:797:in `block in migrate'
/opt/theforeman/tfm/root/usr/share/gems/gems/activerecord-5.2.1/lib/active_record/connection_adapters/abstract/connection_pool.rb:414:in `with_connection'
/opt/theforeman/tfm/root/usr/share/gems/gems/activerecord-5.2.1/lib/active_record/migration.rb:796:in `migrate'
/opt/theforeman/tfm/root/usr/share/gems/gems/activerecord-5.2.1/lib/active_record/migration.rb:977:in `migrate'
/opt/theforeman/tfm/root/usr/share/gems/gems/activerecord-5.2.1/lib/active_record/migration.rb:1292:in `block in execute_migration_in_transaction'
/opt/theforeman/tfm/root/usr/share/gems/gems/activerecord-5.2.1/lib/active_record/migration.rb:1343:in `block in ddl_transaction'
/opt/theforeman/tfm/root/usr/share/gems/gems/activerecord-5.2.1/lib/active_record/connection_adapters/abstract/database_statements.rb:254:in `block in transaction'
/opt/theforeman/tfm/root/usr/share/gems/gems/activerecord-5.2.1/lib/active_record/connection_adapters/abstract/transaction.rb:239:in `block in within_new_transaction'
/opt/theforeman/tfm/root/usr/share/gems/gems/activerecord-5.2.1/lib/active_record/connection_adapters/abstract/transaction.rb:236:in `within_new_transaction'
/opt/theforeman/tfm/root/usr/share/gems/gems/activerecord-5.2.1/lib/active_record/connection_adapters/abstract/database_statements.rb:254:in `transaction'
/opt/theforeman/tfm/root/usr/share/gems/gems/activerecord-5.2.1/lib/active_record/transactions.rb:212:in `transaction'
/opt/theforeman/tfm/root/usr/share/gems/gems/activerecord-5.2.1/lib/active_record/migration.rb:1343:in `ddl_transaction'
/opt/theforeman/tfm/root/usr/share/gems/gems/activerecord-5.2.1/lib/active_record/migration.rb:1291:in `execute_migration_in_transaction'
/opt/theforeman/tfm/root/usr/share/gems/gems/activerecord-5.2.1/lib/active_record/migration.rb:1263:in `block in migrate_without_lock'
/opt/theforeman/tfm/root/usr/share/gems/gems/activerecord-5.2.1/lib/active_record/migration.rb:1262:in `each'
/opt/theforeman/tfm/root/usr/share/gems/gems/activerecord-5.2.1/lib/active_record/migration.rb:1262:in `migrate_without_lock'
/opt/theforeman/tfm/root/usr/share/gems/gems/activerecord-5.2.1/lib/active_record/migration.rb:1210:in `block in migrate'
/opt/theforeman/tfm/root/usr/share/gems/gems/activerecord-5.2.1/lib/active_record/migration.rb:1363:in `with_advisory_lock'
/opt/theforeman/tfm/root/usr/share/gems/gems/activerecord-5.2.1/lib/active_record/migration.rb:1210:in `migrate'
/opt/theforeman/tfm/root/usr/share/gems/gems/activerecord-5.2.1/lib/active_record/migration.rb:1036:in `up'
/opt/theforeman/tfm/root/usr/share/gems/gems/activerecord-5.2.1/lib/active_record/migration.rb:1011:in `migrate'
/opt/theforeman/tfm/root/usr/share/gems/gems/activerecord-5.2.1/lib/active_record/tasks/database_tasks.rb:172:in `migrate'
/opt/theforeman/tfm/root/usr/share/gems/gems/activerecord-5.2.1/lib/active_record/railties/databases.rake:60:in `block (2 levels) in <top (required)>'
/opt/rh/rh-ruby25/root/usr/share/gems/gems/rake-12.3.0/exe/rake:27:in `<top (required)>'
Tasks: TOP => db:migrate

I'm, since the update, unable to use foreman.

I'm using CentOS 7.