Fatal error: Uncaught mysqli_sql_exception: Cannot delete or update a parent row: a foreign key constraint fails (`msh373ict301`.`course`, CONSTRAINT `course_ibfk_1` FOREIGN KEY (`department_id`) REFERENCES `Department` (`id`)) in /var/www/html/ict301/201/msh373/Final project/delete_Department.php:6 Stack trace: #0 /var/www/html/ict301/201/msh373/Final project/delete_Department.php(6): mysqli_query() #1 {main} thrown in /var/www/html/ict301/201/msh373/Final project/delete_Department.php on line 6