Fatal error: Uncaught mysqli_sql_exception: Cannot delete or update a parent row: a foreign key constraint fails (`cyco223ict301`.`Orders`, CONSTRAINT `Orders_ibfk_1` FOREIGN KEY (`customer_id`) REFERENCES `Customers` (`customer_id`)) in /var/www/html/ict301/201/cyco223/final301/delete_customer.php:7 Stack trace: #0 /var/www/html/ict301/201/cyco223/final301/delete_customer.php(7): mysqli_query() #1 {main} thrown in /var/www/html/ict301/201/cyco223/final301/delete_customer.php on line 7