Is a blackberry ID assigned by device or user?

I have a Z30, but will be getting a Priv soon. I lost my blackberry ID on the Z30, and a BB tech explained that the only solution was to wipe the phone, backing up contacts, calendar, etc to a Windows computer, and then restarting with a new ID. (The Z30 works fine, but I can't back it up, update apps, download new apps, etc.) When I get my Priv, do I just start over with a new ID and just be more careful? Will I be able to sync my Z30 stuff to the Priv without the Z30 ID?

The Blackberry ID is set by the user. It is your email address and a password that you chose. You have a new BBID and password on the Z30. Do not forget it.