Comment # 3 on bug 1134088 from Wolfgang Bauer

(In reply to Episteme PROMENEUR from comment #2)
> i use kde extra to get last version of digikam, kdeconnect, plasmoid-redshift
> 
> kde connect last version is very important because kdeconnect evolves very
> fast today. kdeconnect-kde must follow kdeconnect-android.
Not really, AFAIK there normally shouldn't be incompatibilities.

And for the one that was recently, we did release an update for Leap 15.0, see
bug#1116123 .

In other words, if there would be a new incompatibility, it should be reported
to us and we'll do a maintenance update if possible.

Of course that won't apply for new features. ;-)

That's rather irrelevant here though, as the problem is that you are using the
KDE:Applications repo too, which contains the incompatible libkgapi.

KDE:Extra is *not* your problem, the version from the standard repo wouldn't
work as well.
But building KDE:Extra against KDE:Applications would solve that problem...