SQL Script Help

I have the script below which was used to change the down status of an interface from down to Unplugged using a custom property Device_Type.

I'm absolutely useless at SQL scripting and I need some help with editing the script so it will change the down status from Unpluggable to Down so its back at its defaults.

UPDATE Interfaces SET UnPluggable=1 WHERE NodeID in (SELECT NodeId FROM Nodes WHERE Device_Type='Access')

Would someone be able to point me i nthe right direction with the script?

Thanks

Jon