Error when making new site

I we are using Pro Sites and New Blog templates to make new blogs/sites.

But when we make and new site this error is coming up.

Insertion Error: Can't write; duplicate key in table 'wp_9_wswebinars_notifications' - The template was not applied. (New Blog Templates - With CREATE TABLE query for Additional Tables)

The table is form the plugin wp-webinar system. I have tried to delete the plugin, remove all and then make a new template, but same problem. In the bottom (when you make the template) you and can select the tables you want in the blog, but this doesn't seem to work with the 'wp_8_wswebinars_notifications'
I have noticed that the an new site will get table 'wp_9_wswebinars_notifications' , and next table 'wp_10_wswebinars_notifications' ...