It means you don't have the oldest version but a new version is forthcoming.
Why do some model names use "MKII"?
Ok I am going to show my ignorance here. It seems very common for an amplifier to have a model name with a MKII reference. It seems to designate either an upgrade or a special version of a previous model. Can anyone educate me as to the origin of this nomenclature? I am guessing it is a tribute to a classic guitar amp, but I'd love to know for sure.