error logs

Hiya,

I just checked error logs and saw some errors.

[08-Dec-2011 22:23:11] WordPress database error Table 'wp_users' already exists 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 '',
PRIMARY KEY (ID),
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
[08-Dec-2011 22:23:11] WordPress database error Table 'wp_usermeta' already exists for query
CREATE TABLE wp_usermeta (
umeta_id bigint(20) unsigned NOT NULL auto_increment,
user_id bigint(20) unsigned NOT NULL default '0',
meta_key varchar(255) default NULL,
meta_value longtext,
PRIMARY KEY (umeta_id),
KEY user_id (user_id),
KEY meta_key (meta_key)
) 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

Also I checked and tested I guess multi-db working slowly is it possible?