See the output of dnf update below, on Fedora:
(...)
Upgrading : kernel-headers-4.15.14-300.fc27.x86_64 55/116
Upgrading : insync-1.4.5.37069-fc25.x86_64 56/116
Running scriptlet: insync-1.4.5.37069-fc25.x86_64 56/116
error: can't create transaction lock on /var/lib/rpm/.rpm.lock (Resource temporarily unavailable)
error: -: key 1 import failed.
which: no xmessage in (/usr/lib/insync:/sbin:/bin:/usr/sbin:/usr/bin:/usr/X11R6/bin)
Insync installation has finished. You may now start it.
Upgrading : ibus-libzhuyin-1.8.91-1.fc27.x86_64
(...)
Is this relevant? Thanks.
Giacecco