The following steps will guide you how to create different groups for breakout sessions.
1. At the admin panel, click on >> Groups >> New Group.
2.Create your group name.
3.Group Type: Choose >> Normal
4. Maximum users in group: 0
5. Then, on the attendees excel spreadsheet, find>> Normal Groups
6. Allocate the created breakout group name(s)or group ID(s) the to respective attendees.