URGENT!! Please Help and save my butt!!! Could someone fix this for me PLEASE???

[eluser]Zong[/eluser]
I was changing the layout of the Forum:http://biofastallergyfree.com/index.php/forums/
Then when I tried to add a new topic, I got this Error message:

MySQL ERROR:

Error Number: 1062

Description: Duplicate entry '0' for key 1

Query: INSERT INTO `exp_forum_topics` (`title`, `body`, `sticky`, `status`, `announcement`, `poll`, `parse_smileys`, `topic_id`, `author_id`, `ip_address`, `forum_id`, `last_post_date`, `last_post_author_id`, `thread_total`, `topic_date`, `board_id`) VALUES ('test', 'test', 'n', 'o', 'n', 'n', 'y', '', '1', '203.45.111.227', '2', '1247049602', '1', '1', '1247049602', '1')


Attached is my data base structure:

Could anyone help me with this Please? It will so much appreciated!!!