OpenPGP check for package “klassy-6.2.breeze6.2.1-10.2.x86_64” (/var/cache/libdnf5/home_paul4us-b9251e1f4b97dd77/packages/klassy-6.2.breeze6.2.1-10.2.x86_64.rpm) from repo “home_paul4us” has failed: Problem occurred when opening the package.
[356/356] Total 100% | 0.0 B/s | 0.0 B | 00m00s
Running transaction
Transaction failed: Signature verification failed.
OpenPGP check for package “klassy-6.2.breeze6.2.1-10.2.x86_64” (/var/cache/libdnf5/home_paul4us-b9251e1f4b97dd77/packages/klassy-6.2.breeze6.2.1-10.2.x86_64.rpm) from repo “home_paul4us” has failed: Problem occurred when opening the package.
Repository and do make a update again. You might have also to check if you can delete manually the file:
(/var/cache/libdnf5/home_paul4us-b9251e1f4b97dd77/packages/klassy-6.2.breeze6.2.1-10.2.x86_64.rpm)
After having an upgrade without errors, you try to activate the repository again. I think this way it will push the new gpg-key or try an new download.