[Koha-devel] Cannot delete patron category

Hi, I am trying to delete the "Kid" category from my server. As we don`t need to because our library is the university library. When i go to delete "Kid" category, it shows me the error that, "Cannot Delete. This category is used 4 times". I am not sure about those users who are in "Kid" category; but, i am sure that, we don`t need them anyway. So, now, *i want to forcefully delete this "KID" category". *How can i do that? Your any kind of advice is highly appreciable. -- Best, Zico