Comment # 3 on bug 1231611 from Fabian Vogt

(In reply to Markus Elfring from comment #2)
> (In reply to Fabian Vogt from comment #1)
> > That sounds like libPlasma6 was not updated.
> 
> How could this happen?
> Should package requirement specifications usually keep known software
> dependencies consistent?

Not all cases are handled automatically. In this case,
https://github.com/rpm-software-management/rpm/pull/2372 would be needed.

For this reason (and others), it's required that on Tumbleweed all package
updates are installed at once.