Hi
Read this howto https://devdocs.prestashop.com/1.7/basics/keeping-up-to-date/upgrade/
1. They don't write anything about configuration files. Overwrite, not overwrite, only move the database configuration?
2. I get an error in the database update step:
PHP Fatal error: Class 'PrestaShopBundle\
\Install\\Upgrade' not found in /[...]/httpdocs/install/upgrade/upgrade.php on line 42
Please help my