Database error when upgrading 3.5.2

hello!!!

I upgraded wp version 3.5.1 to 3.5.2. and all works correctly. But I realised that some log errors appeared:

[Tue Jul 02 07:18:57 2013] [error] [] DbWP database error Table ‘wp_blogs’ already exists for query \nCREATE TABLE wp_blogs (\n blog_id bigint(20) NOT NULL auto_increment,\n site_id bigint(20) NOT NULL default ‘0’,\n domain varchar(200) NOT NULL default ”,\n path varchar(100) NOT NULL default ”,\n registered datetime NOT NULL default ‘0000-00-00 00:00:00’,\n last_updated datetime NOT NULL default ‘0000-00-00 00:00:00’,\n public tinyint(2) NOT NULL default ‘1’,\n archived enum(‘0′,’1’) NOT NULL default ‘0’,\n mature tinyint(2) NOT NULL default ‘0’,\n spam tinyint(2) NOT NULL default ‘0’,\n deleted tinyint(2) NOT NULL default ‘0’,\n lang_id int(11) NOT NULL default ‘0’,\n PRIMARY KEY (blog_id),\n KEY domain (domain(50),path(5)),\n KEY lang_id (lang_id)\n) DEFAULT CHARACTER SET utf8 COLLATE utf8_general_ci made by wp_upgrade, make_db_current_silent, dbDelta

Appears one error for each blog in the network, Why wp is trying to create a new table?

Do you know if exisit any upgrade database error in this WP version?

Thanks a lot!!!