 DROP TABLE IF EXISTS `tbl_cart`;
 CREATE TABLE `tbl_cart` (
   `id` int(10) unsigned NOT NULL AUTO_INCREMENT,
-  `created_at` timestamp NOT NULL DEFAULT '0000-00-00 00:00:00',
+  `created_at` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
   `updated_at` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
   `items_count` int(10) unsigned DEFAULT '0',
   `items_qty` int(10) unsigned DEFAULT '0',

CREATE TABLE `tbl_order_items` (
  `id` int(10) unsigned NOT NULL AUTO_INCREMENT,
  `cart_id` int(10) unsigned NOT NULL DEFAULT '0',
  `created_at` timestamp NOT NULL DEFAULT '0000-00-00 00:00:00',
  `updated_at` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
  `product_id` int(10) unsigned DEFAULT NULL,
  `name` varchar(255) DEFAULT NULL,

CREATE TABLE `tbl_cart_items` (
  `id` int(10) unsigned NOT NULL AUTO_INCREMENT,
  `cart_id` int(10) unsigned NOT NULL DEFAULT '0',
  `created_at` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
  `updated_at` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
  `product_id` int(10) unsigned DEFAULT NULL,
  `name` varchar(255) DEFAULT NULL,
