Debian SID or Wheezy/SID?

[Csanyi Pal <csanyipal@gmail.com>]

Hi,

I'm running Debian GNU/Linux wheezy/sid system.

/etc/apt/sources.list

deb-src http://ftp.debian.org/debian/ sid main contrib non-free
deb     http://ftp.debian.org/debian/ sid main contrib non-free

deb-src http://ftp.debian.org/debian/ wheezy main contrib non-free
deb     http://ftp.debian.org/debian/ wheezy main contrib non-free

So it seems that this a mixed system, right? 

What would happen if I would commented wheezy lines by using a # and
after that I run 'aptitude update' and 'aptitude safe-upgrade'?

Can I mess up my system in this way?

-- 
Regards from Pal