I think what Dave says is correct, but would be interested if someone had actually done this, also.
The best explanation of IDs I have found is in David Brockingtons explanation, pages 66-67 in his Lifecycle Manager presentation, here:-
https://bobj-board.org/t/120212
It doesn’t answer your question, but is a good insight nonetheless…
I think you would be wise to base line your systems and formalise your development process, by putting your Crystal content into Dev…
Mak 1 
(BOB member since 2005-01-06)