Once you've copied your event from last year. You can re-use the divisions and teams that already exist.
Go to Menu > Manage> Players/Teams > Teams.
1. Choose a Division.
2. Select the teams that are no longer playing in that division.
Click on Remove from Division.
3. Add the new teams by using the Add Team with Members button. (Name the team > select the default location > Save)
You can also check in the Division: All list if this "new" team already exists from another division.
If so, select it and click on the Add to Division button.
4. Revise all the teams and their default locations.
You are now ready to Generate a schedule.