How to delete my fitness rings, in order to start from brand new?

Presently I have the Ultra 2, in which I am constantly closing my fitness rings. I noticed recently that my history from when I had the Ultra 1, is being displayed on my Ultra 2. When I had the Ultra 1, I was not as serious with the fitness rings. Does anyone know how may I “permanently delete my entire history of the fitness rings/activities”; so I may start back over brand-spanking new, with accomplishing my fitness rings? Thanks in advance, for your help.