Edit. Step 3 at the bottom of the article states "Add all constraints to the new table and all referencing Foreign Keys. These were added with the "no check" option and then enabled. This avoided a lengthy recheck of all keys.". Although this method is fast, the foreign key will be in an "untrusted" state. More on that here[/url]. In the future we'll be creating the FK with the check option instead of no check.