title: can't activate sqlite3 (~> 1.3.6), already activated sqlite3-1.4.0
body: <p>I’m using Ubuntu and run into to a problem when using db:migrate for ruby project. </p>
  
  <pre><code>rails aborted!
  LoadError: Error loading the 'sqlite3' Active Record adapter. Missing a gem it depends on? can't activate sqlite3 (~&gt; 1.3.6), already activated sqlite3-1.4.0. Make sure all dependencies are added to Gemfile.
  /home/juan/odin_on_rails/RailsaAPP/bin/rails:9:in `&lt;top (required)&gt;'
  /home/juan/odin_on_rails/RailsaAPP/bin/spring:15:in `&lt;top (required)&gt;'
  bin/rails:3:in `load'
  bin/rails:3:in `&lt;main&gt;'
  
  Caused by:
  Gem::LoadError: can't activate sqlite3 (~&gt; 1.3.6), already activated sqlite3-1.4.0. Make sure all dependencies are added to Gemfile.
  /home/juan/odin_on_rails/RailsaAPP/bin/rails:9:in `&lt;top (required)&gt;'
  /home/juan/odin_on_rails/RailsaAPP/bin/spring:15:in `&lt;top (required)&gt;'
  bin/rails:3:in `load'
  bin/rails:3:in `&lt;main&gt;'
  Tasks: TOP =&gt; db:migrate =&gt; db:load_config
  (See full trace by running task with --trace)
  </code></pre>