How to relocate an Ether IO device?

Fairly straightforward question, hopefully! As part of equipment moves, I need to relocate a physical Ethernet IO device between PK controllers. It's composed of multiple LDTs. For audit trail purposes I need to retain all the version control history associated with the device, so I can't export/delete/reimport onto a different node. But for the life of me, Explorer will not let me move the object. Anybody know the trick?