How to publish both a free and a paid version of the same app?

After a couple days of struggle I made some breakthroughs and have a lite version of my app as a draft in BBW that I've tested I can submit now any time to be published. But I also have a full version of the same game I want to publish. When I uploaded the zip file with new bar it tells me that BB ID is already in use (or something similar).

Has anyone here published both a free and a paid version of the same game? Do I need to get a token using another BB ID (I need to make just for this)? and then what happens, I'll have to operate from two separate accounts (vendor portal)?

Any insight much appreciated.