Fatal error: require(): Cannot redeclare class queryconditioninterface in /vhosts/www.czarnkow.psp.wlkp.pl/htdocs/includes/database/database.inc on line 1777

Fatal error: Class 'DeleteQuery_mysql' not found in /vhosts/www.czarnkow.psp.wlkp.pl/htdocs/includes/database/database.inc on line 878