I'm  in  Admin Beginner,  Lightning Experience Customization, 
Set Up Your Org and it's having me setup an Energy Audit object.  I do everything right but it says the object already exists.  I can find it from a prior training,  If I delete the old one will it mess up my badges or anything I need in the future trainings?  Or is there a different action I need to take.  It's been a while since I've worked on this and the object that is already out there was created in classic.