Don't worry about that. Just answer no when it asks if you have the original remote, then you'll skip the confirm steps and it will work fine. Or answer yes, and do the 2 or 3 confirm steps. The BBT-01 profile will probably work fine too, because, like the 320, it's most definitely already in the database.
Asking to confirm signals doesn't mean the codes aren't in the database, it just means there are multiple sets of codes for that device. Panasonic disc players can have any one of 3 possible addresses. 99% of folks never change the address, hence would default to address 1. But Logitech can't read your mind or make assumptions, so it needs a command or two to figure out which address you're using. Bottom line is, if you haven't changed the address in your player or have no idea what I'm talking about, answering no to the orig remote question is all you need to do. If you answer yes anyway, it's still no problem because it only needs to confirm 2 or 3 commands in order to pick the correct code set.