title: Getting an error when trying to run rake db:migrate
body: <p>I am getting the following error when i try the command rake db:migrate</p>
  
  <pre><code>&gt; NOTE: Gem.source_index is deprecated, use Specification. It will be
  &gt; removed on or after 2011-11-01. Gem.source_index called from
  &gt; /home/hilarl/workspace/depot/vendor/rails/railties/lib/rails/gem_dependency.rb:21.
  &gt; NOTE: Gem::SourceIndex#initialize is deprecated with no replacement.
  &gt; It will be removed on or after 2011-11-01. Gem::SourceIndex#initialize
  &gt; called from
  &gt; /home/hilarl/workspace/depot/vendor/rails/railties/lib/rails/vendor_gem_source_index.rb:100.
  &gt; NOTE: Gem::SourceIndex#add_spec is deprecated, use
  &gt; Specification.add_spec. It will be removed on or after 2011-11-01.
  &gt; Gem::SourceIndex#add_spec called from
  &gt; /home/hilarl/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/site_ruby/1.9.1/rubygems/source_index.rb:91.
  &gt; NOTE: Gem::SourceIndex#add_spec is deprecated, use
  &gt; Specification.add_spec. It will be removed on or after 2011-11-01.
  &gt; Gem::SourceIndex#add_spec called from
  &gt; /home/hilarl/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/site_ruby/1.9.1/rubygems/source_index.rb:91.
  &gt; NOTE: Gem::SourceIndex#add_spec is deprecated, use
  &gt; Specification.add_spec. It will be removed on or after 2011-11-01.
  &gt; Gem::SourceIndex#add_spec called from
  &gt; /home/hilarl/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/site_ruby/1.9.1/rubygems/source_index.rb:91.
  &gt; NOTE: Gem::SourceIndex#add_spec is deprecated, use
  &gt; Specification.add_spec. It will be removed on or after 2011-11-01.
  &gt; Gem::SourceIndex#add_spec called from
  &gt; /home/hilarl/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/site_ruby/1.9.1/rubygems/source_index.rb:91.
  &gt; NOTE: Gem::SourceIndex#add_spec is deprecated, use
  &gt; Specification.add_spec. It will be removed on or after 2011-11-01.
  &gt; Gem::SourceIndex#add_spec called from
  &gt; /home/hilarl/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/site_ruby/1.9.1/rubygems/source_index.rb:91.
  &gt; NOTE: Gem::SourceIndex#add_spec is deprecated, use
  &gt; Specification.add_spec. It will be removed on or after 2011-11-01.
  &gt; Gem::SourceIndex#add_spec called from
  &gt; /home/hilarl/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/site_ruby/1.9.1/rubygems/source_index.rb:91.
  &gt; WARNING: 'require 'rake/rdoctask'' is deprecated.  Please use 'require
  &gt; 'rdoc/task' (in RDoc 2.4.2+)' instead.
  &gt;     at /home/hilarl/.rvm/gems/ruby-1.9.3-p194@global/gems/rake-0.9.2.2/lib/rake/rdoctask.rb
  &gt; rake aborted! can't activate activesupport-3.2.3, already activated
  &gt; activesupport-2.3.14
  &gt; 
  &gt; (See full trace by running task with --trace)
  </code></pre>
  
  <p>Any idea why this is happening? i am using ubuntu, have ruby 1.9.3-p194 and rails 2.3.14 installed on my system and using sqlite3</p>