From dnf output:
Running transaction
Upgrading : insync-1.3.15.36150-fc25.x86_64
Error unpacking rpm package insync-1.3.15.36150-fc25.x86_64
Error unpacking rpm package insync-1.3.15.36150-fc25.x86_64
error: unpacking of archive failed: cpio: lstat
insync-1.3.15.36150-fc25.x86_64 was supposed to be installed but is not!
Verifying : insync-1.3.15.36150-fc25.x86_64
insync-1.3.14.36131-fc21.x86_64 was supposed to be removed but is not!
Verifying : insync-1.3.14.36131-fc21.x86_64
Seems the RPM is broken. dnf clean all
didn’t help.