Sometimes it feels good to start afresh. To start an entirely new game, you first need to connect your current game to Supercell ID. To connect, please open "Settings" and tap "Connect" under the Supercell ID heading. Follow the on-screen instructions.
After this you can start a new game:
You should now create a Supercell ID also for your new account. This will make switching between your two accounts very easy and will keep your accounts safe.