[Rails Guides] Migrations 3.5 - SQLite Problem

Hello Guys! I'm in need of your help!

I'm going through this page -> Active Record Migrations — Ruby on Rails Guides See the code of the example migration at 3.5 - Using the up/down Methods

So I coded everything like this in to my db/migrate folder. Gave it a version number and all that stuff. Now when I run "rake db:migrate" it gives me the following error: