Regression: Child type is not failing validation for book content type list
>>> [!note] Migrated issue
<!-- Drupal.org comment -->
<!-- Migrated from issue #3551571. -->
Reported by: [smustgrave](https://www.drupal.org/user/3252890)
Related to !117
>>>
<h3 id="summary-problem-motivation">Problem/Motivation</h3>
<p>When selecting a child type it should also be selected as valid book type, currently it's not</p>
<h4 id="summary-steps-reproduce">Steps to reproduce</h4>
<h3 id="summary-proposed-resolution">Proposed resolution</h3>
<p>Fix it so if you select child type you must select in the settings too</p>
<h3 id="summary-remaining-tasks">Remaining tasks</h3>
<h3 id="summary-ui-changes">User interface changes</h3>
<h3 id="summary-api-changes">API changes</h3>
<h3 id="summary-data-model-changes">Data model changes</h3>
issue