using joomla 4.2.8
templae edulif
SPB 3.8.9
php 7.433 (We have detected that your server is using PHP 7.4.33 which is obsolete and no longer receives official security updates by its developers. The Joomla! Project recommends upgrading your site to PHP 8.0 or later which will receive security updates at least until 2023-11-26. )
how save to upgrade to any new version?