Drupal Core version selection

Problem / Motivation

Drupal core selector
themes/simplytest_theme/lib/components/DrupalCoreVersionSelector.js
has selection from 1 instead of 0. Expected to start from 0, isn't it?

      fetchWithCallback(releaseUrl, json => {
        if (json.hasOwnProperty("list")) {
          setDrupalVersions(json.list.map(release => release.version));
          setDrupalVersion(json.list[1].version);
        }
      });