It should work with no problems, but remember: You do that on your own risk!
To make dist upgrade from Sparky 8 to 9 do:
1. Backup your personal files to external disk or partition.
2. Change Debian repositories from trixie to forky at the file:
/etc/apt/sources.list.d/debian.sources (new way)
Types: deb deb-src URIs: http://deb.debian.org/debian/ Suites: forky Components: main contrib non-free non-free-firmware Signed-By: /usr/share/keyrings/debian-archive-keyring.gpg Types: deb deb-src URIs: http://security.debian.org/debian-security/ Suites: forky-security/updates Components: main contrib non-free non-free-firmware Signed-By: /usr/share/keyrings/debian-archive-keyring.gpg Types: deb deb-src URIs: http://deb.debian.org/debian/ Suites: forky-updates Components: main contrib non-free non-free-firmware Signed-By: /usr/share/keyrings/debian-archive-keyring.gpg
or /etc/apt/sources.list (old way)
deb http://deb.debian.org/debian forky main contrib non-free non-free-firmware deb-src http://deb.debian.org/debian forky main contrib non-free non-free-firmware deb http://security.debian.org/debian-security/ forky-security/updates main contrib non-free non-free-firmware deb-src http://security.debian.org/debian-security/ forky-security/updates main contrib non-free non-free-firmware deb http://deb.debian.org/debian forky-updates main contrib non-free non-free-firmware deb-src http://deb.debian.org/debian forky-updates main contrib non-free non-free-firmware deb http://deb-multimedia.org/ forky main non-free
3. Change Sparky repositories from sisters to tiamat at the file:
/etc/apt/sources.list.d/sparky.sources
So it should look like that (new way):
Types: deb deb-src URIs: https://repo.sparkylinux.org/ Suites: core Components: main Signed-By: /etc/apt/trusted.gpg.d/sparky-repo.asc Types: deb deb-src URIs: https://repo.sparkylinux.org/ Suites: tiamat Components: main Signed-By: /etc/apt/trusted.gpg.d/sparky-repo.asc
or /etc/apt/sources.list.d/sparky.list (old way):
deb [signed-by=/usr/share/keyrings/sparky.gpg.key] https://repo.sparkylinux.org/ core main deb-src [signed-by=/usr/share/keyrings/sparky.gpg.key] https://repo.sparkylinux.org/ core main deb [signed-by=/usr/share/keyrings/sparky.gpg.key] https://repo.sparkylinux.org/ forky main deb-src [signed-by=/usr/share/keyrings/sparky.gpg.key] https://repo.sparkylinux.org/ forky main
4. Refresh package list:
sudo apt update
5. Dist upgrade now:
sudo apt full-upgrade
If any problem run:
sudo dpkg-reconfigure -a sudo apt install -f