Duplicate entry '2', 'Top Menu'

Hi,
The, "New Blog Template" plugin seems to work well. However, I am getting the following error when I create a new site:

WordPress database error: [Duplicate entry '2' for key 'PRIMARY'] INSERT INTO wp_5_terms (term_id,name,slug,term_group) VALUES (2,'Top Menu','top-menu',0)

I am not sure of the cause of this?