Rails: You have already activated rake 10.3.1, but your Gemfile requires rake 10.2.2 (Gem::LoadError)

Question

Here is my error:

rake aborted!
Gem::LoadError: You have already activated rake 10.3.1, but your Gemfile requires rake 10.2.2. Prepending `bundle exec` to yo         


        

Answer 1

I tried another way which is delete Gemfile.lock then run bundle install. After that I run rake db:migrate. And everything works fine.

Although I don't think remove Gemfile.lock is bad practice, but may be; who know.