error with plugin 'new blog template'

I created a new site as admin and set it as the default new site on creation.

When I create a new site in the frontend as a user, I recieve an email to activate and when I click it I get the following error:

“Insertion Error: Duplicate entry ‘theme_my_login’ for key 2 – The template was not applied. (New Blog Templates – While inserting templated settings)”

Please help!