Starting my PC: When Plasma is up I am to enter root password for mounting a partition

This is on openSUSE tumbleweed but with about 6 other distros all over the machine. The actually runnung tumbleweed is on /dev/sdc2 and /home on /dev/sdc6. A popup pops up ;) and says that the partition to be mounted is /dev/sdb8 which is a recently created logical partition for testing GhostBSD (which didn't work due to its installer). /dev/sdb8 has absolutely no relevance here. When I break off mounting /dev/sdb8 nothing happens or is broken.

How can I find out what is causing this? It says on the popup "polkit.subject-pid: 2366" and polkit.caller-pid: 1983". "px ax" yields Code:1983 ? Ssl 0:01 /usr/lib/udisks2/udisksd
2366 ? Sl 0:01 kded5How can I get rid of this?