yum/dnf update fails with "cannot install both libavif/svt-av1-libs from epel-next and ... from @System"

Symptoms

Running dnf update (or yum update) fails with dependency resolution errors similar to:

CONFIG_TEXT: Problem 1: package ea-phpXX-php-gd-*.x86_64 from @System requires libavif.so.15()(64bit), but none of the providers can be installed
- cannot install both libavif-*.el9.next.x86_64 from epel-next and libavif-*.el9.x86_64 from @System
- cannot install both libavif-*.el9.next.x86_64 from epel-next and libavif-*.el9.x86_64 from epel
- cannot install the best update candidate for package libavif-*.x86_64
- cannot install the best update candidate for package ea-phpXX-php-gd-*.x86_64
Problem 2: package ffmpeg-libs-*.x86_64 from @System requires libSvtAv1Enc.so.0()(64bit), but none of the providers can be installed
- cannot install both svt-av1-libs-*.el9.next.x86_64 from epel-next and svt-av1-libs-*.el9.x86_64 from @System
...

Cause

The epel-next repository is enabled on the server alongside epel. epel-next carries newer builds of libavif and svt-av1-libs than the versions already installed from epel/@System. Those newer epel-next builds no longer provide the specific libraries (libavif.so.15, libSvtAv1Enc.so.0) that the installed EasyApache PHP-GD package and ffmpeg-libs require. During dependency resolution, the package manager tries to select the newest available build as the "best" candidate, finds it from epel-next, and that build conflicts with the already-installed version that is required.

epel-next is not required by cPanel or EasyApache. It is not enabled by default on these operating systems, so its presence usually traces back to a manual repo installation or a third-party script.

Resolution 

1. Confirm epel-next is enabled:

   # dnf repolist enabled | grep -i epel

2. If nothing else on the server depends on epel-next, disable it:

   # yum-config-manager --disable epel-next

   Note: If yum-config-manager is not installed, edit /etc/yum.repos.d/epel-next.repo and set enabled=0 under each section in the file instead.

3. Clear and rebuild the cache:

   # dnf clean all && dnf makecache

4. Perform the update:

   # dnf update