[Rails Guides] Migrations 3.5 - SQLite Problem

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

I'm going through this page -> http://guides.rubyonrails.org/migrations.html
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: