How to delete unnecessary Version Set for a CR?
There is an option available to delete version sets, found at: Phire Architect > Architect Administration > Purge Object Versions. This administrative component allows you to search for and delete version sets using a variety of criteria. This component was intended to be used only by administrators, so there is no direct access to it from the CR component. The permission to use this component is controlled by the normal PeopleTools role/permission list access to the component.