500 er after clean install

AH01071: Got error ‘PHP message: PHP Fatal error: Cannot declare class UpdateDesigns, because the name is already in use in /var/www/vhosts/xyz.group/accounting/database/migrations/2021_04_08_115919_update_designs.php on line 0’, referer: https://xyz/setup

If you ask me: the installer needs serious improvement. When testing the email server, the installer tries to write to a database that isn’t there, with a username and password that isn’t there? Why not use the db credentials that were just provided instead of the default values in the env file.