There are certain instances in which If a staff, admin or teacher account is using an email that later on needs to be used in a different type of account, for example: a parent account. You can easily "release" that email to be used in other UpBup accounts following these steps:
1. Navigate to the Admin/Staff view
2. Select Admin, Teacher or Staff dashboard depending on the account that will be released
3. Select the account using the checkbox at the left
4. Click on "Release Email" at the top of the dashboard
5. See how now that email is not visible, and can now be used to add a different type of account
