diff --git a/wp-admin/includes/class-wp-debug-data.php b/wp-admin/includes/class-wp-debug-data.php
index b7d4fe50ac..a6b6414cf8 100644
--- a/wp-admin/includes/class-wp-debug-data.php
+++ b/wp-admin/includes/class-wp-debug-data.php
@@ -1866,6 +1866,8 @@ class WP_Debug_Data {
 	 * @return array The sizes of the directories, also the database size and total installation size.
 	 */
 	public static function get_sizes() {
+		_deprecated_function( __METHOD__, '5.6.0', 'WP_REST_Site_Health_Controller::get_directory_sizes()' );
+
 		$size_db    = self::get_database_size();
 		$upload_dir = wp_get_upload_dir();
 
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 2b496618bd..a4d35d2b58 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.9-alpha-60273';
+$wp_version = '6.9-alpha-60274';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.