Started Update UTMP about System Runlevel Changes

sudo apt-get update does this:

Hit:1 http://security.debian.org stretch/updates InRelease
Ign:2 Index of /debian stretch InRelease
Hit:3 Index of /debian stretch-updates InRelease
Hit:4 Index of /debian stretch Release
Ign:7 Index of /download/repository sarge InRelease
Hit:8 Index of /download/repository sarge Release
Hit:6 Index of /osmc/osmc/apt stretch InRelease
Problem parsing dependency 20
Error occurred while processing libadminutil0 (NewVersion2)
Problem with MergeList /var/lib/apt/lists/ftp.debian.org_debian_dists_stretch_main_binary-armhf_Packages
The package lists or status file could not be parsed or opened.
Can’t call method “policy” on an undefined value at /usr/bin/apt-show-versions line 56.
Reading package lists… Error!
E: Problem executing scripts APT::Update::Post-Invoke-Success ‘test -x /usr/bin/apt-show-versions || exit 0 ; apt-show-versions -i’
E: Sub-process returned an error code
E: Problem parsing dependency 20
E: Error occurred while processing libadminutil0 (NewVersion2)
E: Problem with MergeList /var/lib/apt/lists/ftp.debian.org_debian_dists_stretch_main_binary-armhf_Packages
E: The package lists or status file could not be parsed or opened.

I don’t have a SSH port opened on my router. I’m only forwarding the 443 port for the NexctCloud.
What does this log entry mean?