Help with this error please

Hi,
Can someone please tell me how to fix this error below:
This comes up when inserting a record.
Duplicate entry '0-1' for key 2

query is this:
INSERT INTO topics ( ID_TOPIC , isSticky , ID_BOARD, ID_FIRST_MSG , ID_LAST_MSG, ID_MEMBER_STARTED , ID_MEMBER_UPDATED , ID_POLL , numReplies , numViews , locked ) VALUES
('', 0, '1', '7',0, '15', 0, 0, 0, '551', 0)

Table structure is this:

ID_TOPIC mediumint(8) unsigned NOT NULL auto_increment,
isSticky tinyint(4) NOT NULL default '0',
ID_BOARD smallint(5) unsigned NOT NULL default '0',
ID_FIRST_MSG int(10) unsigned NOT NULL default '0',
ID_LAST_MSG int(10) unsigned NOT NULL default '0',
ID_MEMBER_STARTED mediumint(8) unsigned NOT NULL default '0',
ID_MEMBER_UPDATED mediumint(8) unsigned NOT NULL default '0',
ID_POLL mediumint(8) unsigned NOT NULL default '0',
numReplies int(10) unsigned NOT NULL default '0',
numViews int(10) unsigned NOT NULL default '0',
locked tinyint(4) NOT NULL default '0',
PRIMARY KEY ( ID_TOPIC ),
UNIQUE KEY lastMessage ( ID_LAST_MSG , ID_BOARD ),
UNIQUE KEY firstMessage ( ID_FIRST_MSG , ID_BOARD ),
UNIQUE KEY poll ( ID_POLL , ID_TOPIC ),
KEY isSticky ( isSticky ),
KEY ID_BOARD ( ID_BOARD )
) ENGINE=MyISAM DEFAULT CHARSET=latin1 AUTO_INCREMENT=3 ;



Which values I need to change in above query so it works?
Thanks

 

Value for ID_BOARD. You have already a record in the table with 0 isSticky and 1 ID_BOARD.

 

Below is the backup of this table. Both records have "0" for sticky, and "1" for ID_BOARD. If the error is with these 2 fields, then why is the second record inserted properly?

INSERT INTO topics ( ID_TOPIC , isSticky , ID_BOARD , ID_FIRST_MSG , ID_LAST_MSG , ID_MEMBER_STARTED , ID_MEMBER_UPDATED , ID_POLL , numReplies , numViews , locked ) VALUES
(1, 0, 1, 1, 2, 0, 1, 0, 1, 1, 0),
(2, 0, 1, 3, 3, 1, 1, 0, 0, 0, 0);

I think it's some other field, but not sure which one...
regards

 

Ok, This is solved. The problem was in ID_FIRST_MSG , ID_LAST_MSG fields.
Value for those records are 0,0 and new records I was adding were also 0,0 . Changed it to -1,-1 and updated later.
Thanks