Updating XML sitemap with language causes fatal error

I enabled the language module on my site, and then went to go update the sitemap to the default language.

The website encountered an unexpected error. Please try again later.</br></br><em class="placeholder">Drupal\Core\Config\ConfigDuplicateUUIDException</em>: Attempt to save a configuration entity &#039;g3XYqcXbSKPVBDODwnT6pq7oqhCFkPryj4vVqrl_Kfc&#039; with UUID &#039;1af1b0e9-db49-453d-a439-918683b1402b&#039; when this UUID is already used for &#039;NXhscRe0440PFpI5dSznEVgmauL25KojD7u4e9aZwOM&#039; in <em class="placeholder">Drupal\Core\Config\Entity\ConfigEntityBase-&gt;preSave()</em> (line <em class="placeholder">326</em> of <em class="placeholder">core/lib/Drupal/Core/Config/Entity/ConfigEntityBase.php</em>). <pre class="backtrace">Drupal\Core\Entity\EntityStorageBase-&gt;doPreSave(Object) (Line: 426)
Drupal\Core\Entity\EntityStorageBase-&gt;save(Object) (Line: 263)
Drupal\Core\Config\Entity\ConfigEntityStorage-&gt;save(Object) (Line: 390)
Drupal\Core\Entity\Entity-&gt;save() (Line: 632)
Drupal\Core\Config\Entity\ConfigEntityBase-&gt;save() (Line: 75)
Drupal\xmlsitemap\Form\XmlSitemapForm-&gt;save(Array, Object)
call_user_func_array(Array, Array) (Line: 111)
Drupal\Core\Form\FormSubmitter-&gt;executeSubmitHandlers(Array, Object) (Line: 51)
Drupal\Core\Form\FormSubmitter-&gt;doSubmitForm(Array, Object) (Line: 589)
Drupal\Core\Form\FormBuilder-&gt;processForm(&#039;xmlsitemap_sitemap_edit_form&#039;, Array, Object) (Line: 318)
Drupal\Core\Form\FormBuilder-&gt;buildForm(&#039;xmlsitemap_sitemap_edit_form&#039;, Object) (Line: 93)
Drupal\Core\Controller\FormController-&gt;getContentResult(Object, Object)
call_user_func_array(Array, Array) (Line: 123)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber-&gt;Drupal\Core\EventSubscriber\{closure}() (Line: 582)
Drupal\Core\Render\Renderer-&gt;executeInRenderContext(Object, Object) (Line: 124)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber-&gt;wrapControllerExecutionInRenderContext(Array, Array) (Line: 97)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber-&gt;Drupal\Core\EventSubscriber\{closure}() (Line: 151)
Symfony\Component\HttpKernel\HttpKernel-&gt;handleRaw(Object, 1) (Line: 68)
Symfony\Component\HttpKernel\HttpKernel-&gt;handle(Object, 1, 1) (Line: 57)
Drupal\Core\StackMiddleware\Session-&gt;handle(Object, 1, 1) (Line: 47)
Drupal\Core\StackMiddleware\KernelPreHandle-&gt;handle(Object, 1, 1) (Line: 99)
Drupal\page_cache\StackMiddleware\PageCache-&gt;pass(Object, 1, 1) (Line: 78)
Drupal\page_cache\StackMiddleware\PageCache-&gt;handle(Object, 1, 1) (Line: 47)
Drupal\Core\StackMiddleware\ReverseProxyMiddleware-&gt;handle(Object, 1, 1) (Line: 52)
Drupal\Core\StackMiddleware\NegotiationMiddleware-&gt;handle(Object, 1, 1) (Line: 23)
Stack\StackedHttpKernel-&gt;handle(Object, 1, 1) (Line: 665)
Drupal\Core\DrupalKernel-&gt;handle(Object) (Line: 19)
</pre>