Fatal error: Uncaught mysqli_sql_exception: Cannot delete or update a parent row: a foreign key constraint fails (`u559533169_cach`.`invoices`, CONSTRAINT `invoices_ibfk_2` FOREIGN KEY (`customer_id`) REFERENCES `customers` (`id`) ON UPDATE CASCADE) in /home/u559533169/domains/sarprog.com/public_html/shopQ/customers/delete.php:15 Stack trace: #0 /home/u559533169/domains/sarprog.com/public_html/shopQ/customers/delete.php(15): mysqli_stmt->execute() #1 {main} thrown in /home/u559533169/domains/sarprog.com/public_html/shopQ/customers/delete.php on line 15