Fatal error: Uncaught mysqli_sql_exception: Cannot delete or update a parent row: a foreign key constraint fails (`zeiterfassung_db`.`positionen`, CONSTRAINT `positionen_ibfk_1` FOREIGN KEY (`benutzer_id`) REFERENCES `benutzer` (`id`)) in /var/www/html/users.php:9 Stack trace: #0 /var/www/html/users.php(9): mysqli_stmt->execute() #1 {main} thrown in /var/www/html/users.php on line 9