CakePHP - Disable validation in controler

When upgrading an old web application to start using CakePHP but the old systems was riddled with invalid data. When the creating the CRUD system I need a way of updating this invalid data.

The following line of code will disable the validation in the controller.

$this->Story->validate = array(); // Stop valadation on the story.

Source: Cakephp Save with a table where the primary key is not €˜id"