Update Employee's Email Address Returns: This entity already exist.

Administrator is updating the email address of an employee record. Employee record does not have other relationship (e.g. Customer, Vendor), no duplicate record and has a login access. When saving the record, the following error is returned: "This entity already exist."
 
To resolve this error, perform the following steps:

 

1. Navigate to Lists > Employees > Employees
2. Edit the employee record
3. Remove email address
4. Click the Access tab
5. Uncheck the Give Access check box
6. In the Roles subtab, remove the roles added
7. Click Save

8. Edit the employee record
9. Update the email address
10. Navigate to Access tab and check the Give Access check box, add the roles that were removed on the Roles subtab and enter password
11. Click Save