I upgraded to testing from current stable by changing "sources.list" file in this way:
I use Gnome Desktop Environment and in About Panel (Settings > Details > About) the name of the system is Debian GNU/Linux bullseye/sid. Isn't "sid" unstable version of Debian? Did I do something wrong?# See https://wiki.debian.org/SourcesList for more information.
deb http://deb.debian.org/debian testing main contrib non-free
deb-src http://deb.debian.org/debian testing main contrib non-free
deb http://security.debian.org testing-security main contrib non-free
deb-src http://security.debian.org testing-security main contrib non-free
#deb http://deb.debian.org/debian testing-updates main
#deb-src http://deb.debian.org/debian testing-updates main
#deb http://security.debian.org/debian-security/ testing/updates main
#deb-src http://security.debian.org/debian-security/ testing/updates main
Thanks in advance