diff -r 7b1b88e27a20 -r 48c4eec2b7e6 wp/wp-includes/ms-network.php
--- a/wp/wp-includes/ms-network.php	Thu Sep 29 08:06:27 2022 +0200
+++ b/wp/wp-includes/ms-network.php	Fri Sep 05 18:40:08 2025 +0200
@@ -96,7 +96,7 @@
 		do_action( 'clean_network_cache', $id );
 	}
 
-	wp_cache_set( 'last_changed', microtime(), 'networks' );
+	wp_cache_set_last_changed( 'networks' );
 }
 
 /**
@@ -122,7 +122,7 @@
  * Adds any networks from the given IDs to the cache that do not already exist in cache.
  *
  * @since 4.6.0
- * @access private
+ * @since 6.1.0 This function is no longer marked as "private".
  *
  * @see update_network_cache()
  * @global wpdb $wpdb WordPress database abstraction object.