table 'users' already exists

I'm writing an application and decided late in the game that I needed authentication, so after viewing Ryan's railscast, I downloaded the plugin: script/plugin source http://svn.techno-weenie.net/projects/plugins/ script/plugin install restful_authentication script/generate authenticated user session rake db:migrate

I'm getting the error: rake aborted! Mysql::Error: Table 'users' already exists: CREATE TABLE users ('id' int(11) DEFAULT NULL auto_increment PRIMARY KEY) ENGINE=InnoDB

What's the best way to fix this. Will it work to just migrate back to version=0 and delete the migration files having to do with a users table I tried to create on my own in the beginning? or will that just blow everything up?