When changing linux distro, is it necessary to remove the old one?

From: Zero (sboonkrong_at_yahoo.com)
Date: 08/31/04


Date: 30 Aug 2004 20:22:01 -0700

I'm thinking about changing from Mandrake to Suse. Is it necessary to
delete Mandrake before installing Suse?

Or it is ok just to install suse over mandrake?