Mario Peshev

Delete all Custom Field entries assigned to posts that do not exist in the posts table.
Navigate to Settings -> Remove Unused CFs and delete all postmeta for non-existing posts.

DX Remove Unused Custom Fields

Does exactly what it says.
Installed, navigate to the settings page, click "Delete" and Done! Cannot be easier than that.
Thank you!



Simply Awesome!

Delete the Custom Fields from your postmeta table where assigned posts no longer exist.

Marcin Pietrzak

WP Sitemap Control allows you to easily manage which post types and taxonomies are included in your WordPress site’s built-in <a href="https://make.wordpress.org/core/2020/07/22/new-xml-sitemaps-functionality-in-wordpress-5-5/" rel="nofollow ugc">sitemap</a>. By default, all public post types and taxonomies appear in the <a href="https://make.wordpress.org/core/2020/07/22/new-xml-sitemaps-functionality-in-wordpress-5-5/" rel="nofollow ugc">sitemap</a>, but with this plugin, you can include or exclude specific content types to better control your site’s SEO and indexing.
Key Features: 
– Include or exclude selected post types and taxonomies from your sitemap. 
– Exclude individual taxonomy terms from the sitemap. 
– Exclude individual entries, such as the Privacy Policy page, from the sitemap. 
– Simple configuration via the WordPress admin menu. 
– Compatible with WordPress 6.0+ and PHP 8.0+. 
– Supports translation and is open source.
This plugin is ideal for site owners who want more granular control over their sitemap and wish to prevent certain content from being indexed or archived by search engines. [Learn more about sitemaps][].
The configuration allows you to turn off individual content from the sitemap – an example is “Privacy Policy”, which we do not need to have in our sitemap, and by combining the plugin capabilities <a href="https://wordpress.org/plugins/simple-seo-improvements/" rel="ugc">Simple SEO Improvements</a> we can also avoid indexing and archiving it.
<h4>See room for improvement?</h4>
Great! There are several ways you can get involved to help make WP Sitemap Control better:
<ol>
<li>Report Bugs: If you find a bug, error or other problem, please report it! You can do this by <a href="https://wordpress.org/support/plugin/wp-sitemap-control/" rel="ugc">creating a new topic</a> in the plugin forum. Once a developer can verify the bug by reproducing it, they will create an official bug report in <a href="https://github.com/iworks/wp-sitemap-control" rel="nofollow ugc">GitHub</a> where the bug will be worked on.</li>
<li>Suggest New Features: Have an awesome idea? Please share it! Simply <a href="https://wordpress.org/support/plugin/wp-sitemap-control/" rel="ugc">create a new topic</a> in the plugin forum to express your thoughts on why the feature should be included and get a discussion going around your idea.</li>
<li>Issue Pull Requests: If you’re a developer, the easiest way to get involved is to help out on <a href="https://github.com/iworks/wp-sitemap-control/issues" rel="nofollow ugc">issues already reported</a> in GitHub. Be sure to check out the <a href="https://github.com/iworks/wp-sitemap-control/blob/master/contributing.md" rel="nofollow ugc">contributing guide</a> for developers.</li>
</ol>
Thank you for wanting to make WP Sitemap Control better for everyone!

WP Sitemap Control

WP Sitemap Control allow choosing which public post types or taxonomies should be able in the /wp-sitemap.xml

DX Remove Unused Custom Fields vs WP Sitemap Control