Updating to the next version

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Before starting, you need to install the dnf-plugin-system-upgrade package.

dnf install dnf-plugin-system-upgrade

After that, this is normally enough (example for 37 -> 38):

dnf -y system-upgrade download --refresh --releasever=38 --allowerasing --best --skip-broken 2> error.log ; dnf system-upgrade reboot
cat error.log | grep -v "^No match for group package" | grep -v "^Error:"

However, you might encouter problems like:

Remove obsolete packages

We can analyse the error.log file:

echo "Check if these packages can be deleted:"
cat error.log | grep -v "^No match for group package" | grep -v "^Error:" | grep "does not belong to a distupgrade repository"

Check if these packages can be deleted:
  - jack-audio-connection-kit-example-clients-1.9.21-3.fc37.x86_64 from @System  does not belong to a distupgrade repository

Now we can try to remove the obsolte package carefully(!!!):

yum remove --noautoremove jack-audio-connection-kit-example-clients

After that we can try to run the upgrade again:

dnf -y system-upgrade download --refresh --releasever=38 --allowerasing --best --skip-broken 2> error.log ; dnf system-upgrade reboot
cat error.log | grep -v "^No match for group package" | grep -v "^Error:"

Remove packages from an OS version before the current one

We are at version 37, want to get to version 38 but get complains about pacakges from version 36:

cat error.log | grep -v "^No match for group package" | grep -v "^Error:"

 Problem: package kernel-modules-extra-5.19.16-200.fc36.x86_64 from @System requires kernel-uname-r = 5.19.16-200.fc36.x86_64, but none of the providers can be installed
  - conflicting requests

Now we can try to remove the obsolte package carefully(!!!). However, use the full(!!!) package name. Means with package and os version:

dnf remove --noautoremove kernel-modules-extra-5.19.16-200.fc36.x86_64

After that we can try to run the upgrade again:

dnf -y system-upgrade download --refresh --releasever=38 --allowerasing --best --skip-broken 2> error.log ; dnf system-upgrade reboot
cat error.log | grep -v "^No match for group package" | grep -v "^Error:"

The source code is Open Source and can be found on GitHub.