title: Allow Numeric Slugs for Wordpress CPT
body: <p>Is that possible to <strong>Allow Numeric Slugs</strong> (without -2) for custom post type without plugins?</p>
  <p><a href="https://i.stack.imgur.com/RJXgp.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/RJXgp.png" alt="enter image description here" /></a></p>