Effect of changing site screenname on PT

[Baintz]

I want to change my screenname at some of the sites I play at, but presumably this will have an affect on my PT database.

Is there anyway for PT to recognize my new name as 'the old me', so that my database stats just continue as they were, or will I be left with two sets of stats - one set for my old name and a new set for all hands played after the name change?