Ошибка при добавлении товара в несколько категорий - JoomShopping

Duplicate entry '1' for key 'product_id_2' SQL=INSERT INTO `jos_jshopping_products_to_categories` SET `product_id` = '1', `category_id` = '1', `product_ordering` = '1'

CREATE TABLE IF NOT EXISTS `jos_jshopping_products_to_categories` (
  `product_id` int(11) NOT NULL,
  `category_id` int(11) NOT NULL,
  `product_ordering` int(11) NOT NULL,
  PRIMARY KEY (`product_id`,`category_id`),
  UNIQUE KEY `product_id_2` (`product_id`),
  UNIQUE KEY `product_id_3` (`product_id`),
  UNIQUE KEY `product_id_4` (`product_id`),
  UNIQUE KEY `product_id_6` (`product_id`),
  KEY `category_id` (`category_id`),
  KEY `product_id` (`product_id`),
  KEY `category_id_2` (`category_id`),
  KEY `product_id_5` (`product_id`),
  KEY `category_id_3` (`category_id`),
  KEY `product_ordering` (`product_ordering`),
  KEY `category_id_4` (`category_id`),
  KEY `product_id_7` (`product_id`),
  KEY `product_id_8` (`product_id`),
  KEY `category_id_5` (`category_id`),
  KEY `product_ordering_2` (`product_ordering`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8;

CREATE TABLE IF NOT EXISTS `jos_jshopping_products_to_categories` (
  `product_id` int(11) NOT NULL,
  `category_id` int(11) NOT NULL,
  `product_ordering` int(11) NOT NULL,
  PRIMARY KEY (`product_id`,`category_id`),
  KEY `category_id` (`category_id`),
  KEY `product_id` (`product_id`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8;