apply_filters( "get_{$adjacent}_post_sort", string $order_by, WP_Post $post, string $order )

2006	 * @since 6.9.0 Adds ID sort to ensure deterministic ordering for posts with identical dates.2007	 *2008	 * @param string $order_by The `ORDER BY` clause in the SQL.2009	 * @param WP_Post $post    WP_Post object.2010	 * @param string  $order   Sort order. 'DESC' for previous post, 'ASC' for next.2011	 */2012	$sort = apply_filters( "get_{$adjacent}_post_sort", "ORDER BY p.post_date $order, p.ID $order LIMIT 1", $post, $order );2013 2014	$query        = "SELECT p.ID FROM $wpdb->posts AS p $join $where $sort";2015	$key          = md5( $query );2016	$last_changed = (array) wp_cache_get_last_changed( 'posts' );2017	if ( $in_same_term || ! empty( $excluded_terms ) ) {2018		$last_changed[] = wp_cache_get_last_changed( 'terms' );