Incorrect table definition

I get the following message after installing the latest dev snapshot:

user warning: Incorrect table definition; there can be only one auto column and it must be defined as a key query: CREATE TABLE ejournal_log ( lid int(9) NOT NULL auto_increment, id int(9) NOT NULL default '0', entity varchar(16) NOT NULL default '', uid int(6) NOT NULL default '0', type varchar(16) NOT NULL default '', message text NOT NULL default '', hostname varchar(128) NOT NULL default '', timestamp int(11) NOT NULL default '0', PRIMARY KEY (id) ) Type=MyISAM; in /home/.mysite.org/includes/database.mysql.inc on line 172.