Is There An MT Doctor In The House?

I just tried to do an upgrade from 2.661 to 3.333 (or whatever the latest version is), and I got the following error:

Error during upgrade: failed to execute statement create table mt_log ( log_id integer not null primary key auto_increment, log_author_id integer default 0, log_blog_id integer default 0, log_category varchar(255), log_class varchar(255) default ‘system’, log_ip varchar(16), log_level integer default 1, log_message varchar(255), log_metadata varchar(255), log_created_on datetime, log_created_by integer, log_modified_on timestamp not null, log_modified_by integer ): Table ‘mt_log’ already exists at /usr/home/simberg/domains/transterrestrial.com/lib/MT/Upgrade.pm line 1190.

Anyone know what the problem is, and how to fix?

(Good thing I backed up my installation and database…)