Bugs or is it :)

Hello Guys

Please have a look at the err below

I need to fix it but i need to know what i need to fix Is it a bot that is out of control ?

[03-Nov-2011 21:45:30] WordPress database error  for query
CREATE TABLE wp_users (
ID bigint(20) unsigned NOT NULL auto_increment,
user_login varchar(60) NOT NULL default '',
user_pass varchar(64) NOT NULL default '',
user_nicename varchar(50) NOT NULL default '',
user_email varchar(100) NOT NULL default '',
user_url varchar(100) NOT NULL default '',
user_registered datetime NOT NULL default '0000-00-00 00:00:00',
user_activation_key varchar(60) NOT NULL default '',
user_status int(11) NOT NULL default '0',
display_name varchar(250) NOT NULL default '',
KEY user_login_key (user_login),
KEY user_nicename (user_nicename)
) DEFAULT CHARACTER SET utf8 COLLATE utf8_general_ci made by wpmu_activate_signup, wpmu_create_blog, install_blog, make_db_current_silent, dbDelta, m_wpdb->query