Multiple admin users

Topics: Administration
Apr 15, 2014 at 3:21 AM
I was in process of upgrading orchard from 1.72 to 1.8 when found that there is 2 admin users. I could not delete any of the as they are superusers, and also I could not set Administrator permission as "User with that username and/or email already exists" msg shown after I click on Save button. How I can safely delete one of the admin users? Have done before upgrades from 1.6 to 1.7 and from 1.7 to 1.72.