Changing Device Class leaves "Components" from old Device Class

Running Zenoss 3.2.1 on SUSE

What the correct prodedure to move devices from one Device Class to another?  For example, when I move a device from a /Server device class to the /Ping device class, there are still "Components" from the old Device Class under the "Components" container.   I don't want to delete and re-add the devices because the devices are associated to Groups, Systems, Locations, etc... and I don't want to have to re-associate this on all my devices I need to move.

Is there a way to "reset" a device when moving it to a new Device Class, yet still retain all the other associations like Groups, Systems, Locations?  I don't want the devices I move to have "left over" components and other objects from the old device class.

Thanks!!