Just reinstalled and it did not create the db.
Connected successfully to MySQL server
Es ist schon eine Datenbank mit dem Namen db_ispconfig vorhanden!
Restarting some services...
/usr/bin/apachectl restart: httpd restarted
Shutting down postfix: [ OK ]
Starting postfix: [ OK ]
Shutting down proftpd: [ OK ]
Starting proftpd: [ OK ]
Starting ISPConfig system...
/root/ispconfig/httpd/bin/apachectl startssl: httpd started
Warning: mysql_fetch_array(): supplied argument is not a valid MySQL result resource in /root/ispconfig/scripts/lib/config.inc.php on line 47
No results found!FreshClam is already running!
ISPConfig system is now up and running!
Congratulations! Your ISPConfig system is now installed. If you had to install quota, please take the steps described in the installation manual. Otherwise your system is now available without reboot.
this is the output