Fix vague DNF error "Error -1 during transaction"
Fedora 31, Software 3.34
I got a pretty worthless "Error -1 during transaction" in-app notification after trying to install a package from DNF/Fedora package managers. Turns out the reason was that another dnf process was installing packages concurrently and holding the lock (from another terminal), but the Software displayed error message did not specify any detail about it.
Edited by Andre Klapper