thx, I gonna try

I delete some categories and create new ones, but category number is not started from 1, but the largest deleted category number(delete 1~9, create a new one but id is 10 ). This makes me feel bad.

I know I have to do with mongodb to do such thing. I've tried to update cid n some related stuff, but after just a few seconds it went back to origin. So how can I change cid or delete all categories related datas and start from cid=1?

I used db.objects.find( {_key:"category:2"} ).pretty() and get some info. tried to update cid&order&slug