Plasma PA and Pulseaudio gconf => gsettings module migration
In case you don´t know already: Pulseaudio 12 installation requires
removing Pulseaudio gconf module and thus removing plasma-pa and
replacing it by kmix – and due to that also removing kdemultimedia meta
In case you do not like this, I recommend to skip dist-upgrading Sid
until the issue is resolved or pinning Pulseaudio to the 11 version.
Testing aka Buster still has the 11 version, but I am not sure whether
any bug would hold back the migration of Pulseaudio 12 to testing after
902181: pulseaudio: new pulseaudio update try to remove kde stuff
886048: plasma-pa: Depends on gconf
and upstream bug report
[plasma-pa] [Bug 386665] Drop dependency on pulseaudio-gconf?