Can we make ItemType Itemtype versionable?

HI all,

Can we make ItemType Itemtype versionable so as to keep track of all the changes in properties and relationships?

Is it really possible in Aras?

I edited ItemType Itemtype and set it versionable. Then I create new Item Type "Test" and made two versions of it. But when I tried to open its form it gives me error as "Error While getting details of 'Test' Itemtype".