Leaderboards for development and live environments

Hello,

I'm working on a game application and I've been wondering about how I can separate the GameKit Leaderboards I'm using for testing purpose and the ones that would be "live" (i.e: only for the users)

I've been point out that I can attach leaderboards to an app version but it makes me wondering about compatibility.

I'm working on the application in version 1.1.
My users are using the application in version 1.0 (with their leaderboards).
Then I'm releasing a version 1.2.
It would means I need to attach all the leaderboards from version 1.0 to version 1.2 and to me it's very tedious.

What would be the best practice with using leaderboards on multiple environments?

Thanks