Solution:

1. Clear YUM/DNF cache: First, clean the package manager cache to ensure it is not using outdated information:
   sudo dnf clean all
sudo rm -rf /var/cache/dnf

2. Reconfigure Plesk repositories: Download and reconfigure the Plesk repositories specifically for AlmaLinux 8. Use the following command to reconfigure them:
   sudo plesk installer --select-release-current --reinstall-patch --upgrade-installed-components

3. Update the system: After reconfiguring the repositories, attempt to update Plesk again:
   sudo dnf update

4. Verify the repositories: Ensure that the Plesk repository is pointing to the correct version for AlmaLinux 8. You can edit the repository files in /etc/yum.repos.d/ if needed.
5. Contact Plesk support: If the above steps do not resolve the issue, it may be necessary to contact Plesk support for further assistance.
6. Rename plesk repo: mv /etc/yum.repos.d/plesk.repo /etc/yum.repos.d/plesk.repo.bk

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