[site-reviews] Remove the author ID from reviews when saving

/**
 * This removes the author (user) ID from an existing review when it is saved
 *
 * Paste this in your active theme's functions.php file.
 * @return void
 */
add_action('save_post_site-review', function($postId, $post, $isUpdating) {
    global $wpdb;
    if ($isUpdating && $post->post_author != '0') {
        $wpdb->update($wpdb->posts, ['post_author' => 0], ['ID' => $postId]);
    }
}, 10, 3);