Fatal error: Uncaught mysqli_sql_exception: Cannot delete or update a parent row: a foreign key constraint fails (`hjta227ict301`.`Orders`, CONSTRAINT `Orders_ibfk_1` FOREIGN KEY (`customerID`) REFERENCES `Customer` (`customerID`)) in /var/www/html/ict301/001/hjta227/pizza_project/delete_customer.php:11 Stack trace: #0 /var/www/html/ict301/001/hjta227/pizza_project/delete_customer.php(11): mysqli_query() #1 {main} thrown in /var/www/html/ict301/001/hjta227/pizza_project/delete_customer.php on line 11