Estou tentando propagar meu banco de dados com o padrãodb/seeds.rb método. Isso funciona bem na minha máquina de desenvolvimento, mas no meu servidor, recebo:

$ sudo rake db:seed RAILS_ENV=production --trace
** Invoke db:seed (first_time)
** Invoke environment (first_time)
** Execute environment
** Execute db:seed
rake aborted!
uninitialized constant Permission
/usr/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2503:in `const_missing'
/usr/local/lib/ruby/gems/1.8/gems/activesupport-2.3.4/lib/active_support/dependencies.rb:92:in `const_missing'
/path/.../.../.../.../db/seeds.rb:4
/usr/local/lib/ruby/gems/1.8/gems/rails-2.3.4/lib/tasks/databases.rake:215:in `load'
/usr/local/lib/ruby/gems/1.8/gems/rails-2.3.4/lib/tasks/databases.rake:215
/usr/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:636:in `call'
...

Mas quando eu faço check-in no console, o modelo existe:

$ script/console production
Loading production environment (Rails 2.3.4)
>> Permission
=> Permission(id: integer, ..., created_at: datetime, updated_at: datetime)

O que estou esquecendo?