[23-Sep-2026 10:28:08 UTC] PHP Fatal error:  Uncaught mysqli_sql_exception: Cannot add or update a child row: a foreign key constraint fails (`londuxlw_college`.`products`, CONSTRAINT `fk_product_category` FOREIGN KEY (`category_id`) REFERENCES `categories` (`id`) ON DELETE SET NULL) in /home/londuxlw/londonuniversity.ge/omar/college/admin/product-edit.php:4
Stack trace:
#0 /home/londuxlw/londonuniversity.ge/omar/college/admin/product-edit.php(4): mysqli_stmt_execute()
#1 {main}
  thrown in /home/londuxlw/londonuniversity.ge/omar/college/admin/product-edit.php on line 4
[23-Sep-2026 10:28:22 UTC] PHP Fatal error:  Uncaught mysqli_sql_exception: Cannot add or update a child row: a foreign key constraint fails (`londuxlw_college`.`products`, CONSTRAINT `fk_product_category` FOREIGN KEY (`category_id`) REFERENCES `categories` (`id`) ON DELETE SET NULL) in /home/londuxlw/londonuniversity.ge/omar/college/admin/product-edit.php:4
Stack trace:
#0 /home/londuxlw/londonuniversity.ge/omar/college/admin/product-edit.php(4): mysqli_stmt_execute()
#1 {main}
  thrown in /home/londuxlw/londonuniversity.ge/omar/college/admin/product-edit.php on line 4
