Fatal error: Uncaught mysqli_sql_exception: Duplicate entry '21398-2025-08-31' for key 'statistik.PRIMARY' in /var/www/web1/htdocs/classes/datenbank.class.php:665 Stack trace: #0 /var/www/web1/htdocs/classes/datenbank.class.php(665): mysqli_query() #1 /var/www/web1/htdocs/classes/buchung.class.php(553): datenbank::insert() #2 /var/www/web1/htdocs/mitte/brancheneintrag_liste.inc.php(347): buchung->updateStatistik() #3 /var/www/web1/htdocs/index.php(652): include('...') #4 {main} thrown in /var/www/web1/htdocs/classes/datenbank.class.php on line 665