404 page included in image-sitemap

Hello @ewanmathers

Seems you are using Custom Page for 404 page, therefore Image Sitemap is collecting this page’s content. There are several ways to exclude this page:

• If you use our Pro Version, you can easily Exclude this page from all Sitemaps – https://wpgrim.com/docs/google-xml-sitemaps-generator/pro-features/sitemap-pro-features/
• You can move your 404 page to 404.php in your Theme or Child Theme, then you can delete this page.
• You can use below custom code in your Theme or Child Theme functions.php in order to exclude your 404 page from Sitemaps:

function exclude_404_page( $value, $post_id ) {
	if ( 14754 == $post_id ) {
		return false;
	}

	return $value;
}
add_filter( 'xml_sitemap_include_post', 'exclude_404_page', 99, 2 );

Best regards