râteau abandonnée! Vous avez déjà activé râteau 10.0.2, mais votre Gemfile nécessite râteau 0.9.2.2

Je suis en train de faire "rake db:migrate" et il me donne cette erreur.

Andy:AcademyAir Andy$ rake db:migrate
/Users/Andy/.rvm/gems/ruby-1.9.2-p290/gems/bundler-1.2.2/lib/bundler/runtime.rb:197: warning: Insecure world writable dir /usr in PATH, mode 040777
rake aborted!
You have already activated rake 10.0.2, but your Gemfile requires rake 0.9.2.2. Using bundle exec may solve this.
/Users/Andy/.rvm/gems/ruby-1.9.2-p290/gems/bundler-1.2.2/lib/bundler/runtime.rb:31:in `block in setup'
/Users/Andy/.rvm/gems/ruby-1.9.2-p290/gems/bundler-1.2.2/lib/bundler/runtime.rb:17:in `setup'
/Users/Andy/.rvm/gems/ruby-1.9.2-p290/gems/bundler-1.2.2/lib/bundler.rb:116:in `setup'
/Users/Andy/.rvm/gems/ruby-1.9.2-p290/gems/bundler-1.2.2/lib/bundler/setup.rb:7:in `<top (required)>'
/Users/Andy/Desktop/AcademyAir/config/boot.rb:6:in `<top (required)>'
/Users/Andy/Desktop/AcademyAir/config/application.rb:1:in `<top (required)>'
/Users/Andy/Desktop/AcademyAir/Rakefile:5:in `<top (required)>'
(See full trace by running task with --trace)
InformationsquelleAutor Andy | 2012-11-21