LiveStreet CMS

Пытаюсь перенести статьи и комментарии с Wordpress, статьи успешно перенеслись, а комментарии нет.
Возникла ошибка:

SQL Error: Cannot add or update a child row: a foreign key constraint fails (`livestreet_bd`.`wmap_comment`, CONSTRAINT `wmap_topic_comment_fk` FOREIGN KEY (`comment_pid`) REFERENCES `wmap_comment` (`comment_id`) ON DELETE CASCADE ON UPDATE CASCADE) at Z:\home\livestreet-test.my\www\classes\modules\comment\mapper\Comment.mapper.class.php line 519
Array ( [code] => 1452 [message] => Cannot add or update a child row: a foreign key constraint fails (`livestreet_bd`.`wmap_comment`, CONSTRAINT `wmap_topic_comment_fk` FOREIGN KEY (`comment_pid`) REFERENCES `wmap_comment` (`comment_id`) ON DELETE CASCADE ON UPDATE CASCADE) [query] => INSERT INTO wmap_comment (comment_pid, target_id, target_type, target_parent_id, user_id, comment_text, comment_date, comment_user_ip, comment_publish, comment_text_hash	 ) VALUES('0', 11, 'topic', 1000003, 999999, 'Скажите, а у вас есть RSS поток в этом блоге?', '2009-04-04 18:29:53', '127.0.0.1', 1, 'b6df88bd95838cf1ae960c439fd2a408') [context] => Z:\home\livestreet-test.my\www\classes\modules\comment\mapper\Comment.mapper.class.php line 519 )

Подскажите в чем проблема?