error with rake versioning when running specs in R

Question

I started getting this error and would like a way to fix it:

You have already activated rake 10.1.1, but your Gemfile requires rake 10.1.0. Using bundle exec may solve this.

I am running this from within RubyMine. I can see in my Gemfile.lock where it specifies 10.1.0. Can I just manually update my Gemfile.lock to 10.1.1?

If I do:

$gem list 
....
rake (10.1.1, 10.1.0, 10.0.4, 0.9.2.2)

So I'm not sure why it isn't just working with 10.1.0?

Here's the full output from RubyMine:

/Users/jt/.rvm/rubies/ruby-1.9.3-p448/bin/ruby -e $stdout.sync=true;$stderr.sync=true;load($0=ARGV.shift) /Users/jt/.rvm/gems/ruby-1.9.3-p448/bin/rake spec
Testing started at 3:15 PM ...
rake aborted!
You have already activated rake 10.1.1, but your Gemfile requires rake 10.1.0. Using bundle exec may solve this.
/Users/jt/.rvm/gems/ruby-1.9.3-p448/gems/bundler-1.3.5/lib/bundler/runtime.rb:33:in `block in setup'
/Users/jt/.rvm/gems/ruby-1.9.3-p448/gems/bundler-1.3.5/lib/bundler/runtime.rb:19:in `setup'
/Users/jt/.rvm/gems/ruby-1.9.3-p448/gems/bundler-1.3.5/lib/bundler.rb:120:in `setup'
/Users/jt/.rvm/gems/ruby-1.9.3-p448/gems/bundler-1.3.5/lib/bundler/setup.rb:17:in `<top (required)>'
/Users/jt/repos/app/config/boot.rb:6:in `<top (required)>'
/Users/jt/repos/app/config/application.rb:1:in `<top (required)>'
/Users/jt/repos/app/Rakefile:5:in `<top (required)>'
-e:1:in `load'
-e:1:in `<main>'
(See full trace by running task with --trace)

Process finished with exit code 1

Answer 1

You can remove your

Gemfile.lock file 

and exec

bundle update