In order to create a new team account or join a team you need to use an email address that is not already registered on Wire.
To use an email address that is already registered on Wire:
- In the Wire app (only iOS or Android), go to Profile > Settings > Account.
- Change your email address.
- Verify the new email address.
- Your old email address can now be used to create a new team account.
Go back to teams.wire.com and create a new team account.