How can I decrease Item Drop rate?

How can I decrease Item Drop rate? Metin2 p-server.

Even if i type priv_empire 0 1:Item_drop 0 hour.

The drop rate of server remains actually the same mobs drop a lot stuff is there any other way to change that? From Filezilla or Navicat?

Please reply in English. Ty.

You should ask from a nother p server owner that, would b easyer.