title: How to change ruby-bundle version?
body: <p>I have to run this command (ubuntu 18.04)</p>
  <pre><code>bundle exec rake redmine:plugins NAME=redmine_checklists RAILS_ENV=production
  </code></pre>
  <p>But I got an unknown error</p>
  <pre><code>Unfortunately, an unexpected error occurred, and Bundler cannot continue
  </code></pre>
  <p>Before that I got a bundler's version error, where I had to change bundler version from 2.1.4 to 1.3.0-2.0. I installed the 1.3.0 version, but 2.1.4 was a default, and I remove <code>bundler-2.1.4.gemspec</code> from /var/lib/gems/2.5.0/specifications/default and uninstall 2.1.4.</p>
  <p>So <code>gem list bundler</code> shows only the 1.3.0 default version. But when I run <code>/var/lib/gems/2.5.0/gems/bundler-1.3.0/bin/bundle -v</code>, it shows 2.1.4 version.</p>
  <p>The question is how can I run bundle-1.3.0 instead of bundle-2.1.4?</p>