Just a little tweak

In order to avoid duplicate rows, i just use the “distinct” at query:

add_filter(‘posts_distinct’, ‘search_distinct’);
function search_distinct() {
global $pagenow, $wpdb;
// Filter only when performing a search on edit page on all page / post / custom post type
if ( is_admin() && $pagenow==’edit.php’ && $_GET[‘s’] != ”) {
$distinct = “DISTINCT”;
}

return $distinct;
}

https://www.ads-software.com/plugins/admin-meta-search/