Failed to obtain the transaction lock (logged in as: root).
when I try to install anything this is the full message Running transaction check
Transaction check succeeded.
Running transaction test
Transaction test succeeded.
Running transaction
Failed to obtain the transaction lock (logged in as: root).
The downloaded packages were saved in cache till the next successful transaction.
You can remove cached packages by executing 'dnf clean packages'.
Error: Could not run transaction.
and I tried dnf clean packages
but still the same, should I delete some file? no other process is runnin dnf. It downloaded packages just fine, but failed to isntall them with that error.