This feature could not be reversed, but you will have a new opportunity to create new avatars.

 

Once you unlock “Multiverse” in one of your avatars’ skills list (briefcase icon), you will be able to create a new character. You could create a new life with a new career by tapping on the upper-right corner icon with two small heads and two arrows. For the time being, you will be able to unlock up to 4 avatars.