wp-admin-network-110929-103232

Why I have below error log in wp-admin\network folder?

[29-Sep-2011 10:32:32] WordPress database error Table 'wp_sitecategories' already exists for query CREATE TABLE wp_sitecategories (
cat_ID bigint(20) NOT NULL auto_increment,
cat_name varchar(55) NOT NULL default '',
category_nicename varchar(200) NOT NULL default '',
last_updated timestamp NOT NULL default CURRENT_TIMESTAMP on update CURRENT_TIMESTAMP,
PRIMARY KEY (cat_ID),
KEY category_nicename (category_nicename),
KEY last_updated (last_updated)
); made by require_once, do_action, call_user_func_array, global_site_tags_make_current, global_site_tags_global_install, m_wpdb->query

Can advise? Thank you