Why this Dump fail on import?

This is my table with data :

CREATE TABLE IF NOT EXISTS `categories` (
  `id` int(11) unsigned NOT NULL auto_increment,
  `name` varchar(255) NOT NULL,
  `user` varchar(255) NOT NULL,
  `date` datetime NOT NULL,
  PRIMARY KEY  (`id`)
) ENGINE=MyISAM  DEFAULT CHARSET=utf8 AUTO_INCREMENT=8 ;

--
-- Dump dei dati per la tabella `categories`
--

INSERT INTO `categories` (`id`, `name`, `user`, `date`) VALUES(1, 'K-Bal Sound System', 'djfonplaz', '0000-00-00 00:00:00');
INSERT INTO `categories` (`id`, `name`, `user`, `date`) VALUES(2, 'Network23 Mixtapes', 'djfonplaz', '0000-00-00 00:00:00');
INSERT INTO `categories` (`id`, `name`, `user`, `date`) VALUES(3, 'Artskorps Webmix', 'djfonplaz', '0000-00-00 00:00:00');
INSERT INTO `ca开发者_高级运维tegories` (`id`, `name`, `user`, `date`) VALUES(4, 'GTW Users Mixes', 'djfonplaz', '0000-00-00 00:00:00');
INSERT INTO `categories` (`id`, `name`, `user`, `date`) VALUES(5, 'Underground Music Tapes', 'djfonplaz', '0000-00-00 00:00:00');
INSERT INTO `categories` (`id`, `name`, `user`, `date`) VALUES(6, 'UK Main Events', 'djfonplaz', '0000-00-00 00:00:00');
INSERT INTO `categories` (`id`, `name`, `user`, `date`) VALUES(7, 'Gabba Nation, Bunker & Box, German Events', 'djfonplaz', '0000-00-00 00:00:00');

When I try to import this (with HeidiSql 6.0) I get this error :

/* SQL Error (1062): Duplicate entry '1' for key 1 */

?

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Table categories has to exist and there already is data.

Remove categories table before executing that script.

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if you set auto_increment on primary key, remove the id in INSERT statements

INSERT INTO `categories` (`name`, `user`, `date`) VALUES('K-Bal Sound System', 'djfonplaz', '0000-00-00 00:00:00');
...

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You are inserting a value for your auto increment field. MySQL will automatically insert a value into that field for you so you do not have to try set the value yourself. As it tries to insert your first row it will try to input 1 over the auto increment's value 1.

To fix just remove the id column from your insert.