Comment 104 for bug 1754294

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Andriy Podanenko (podarokua) wrote :

I've removed all apt sources.list and added back from current version of Ubuntu which helped me to package by package upgrade it to current Ubuntu version of the package
I had same issues and they were in a system because some packages were from the previous version ( 16 ) which must be upgraded after OS upgrade to 18

so rm -rf /etc/apt/sources.list.d/*
apt-get update
apt-get upgrade

add all repositories back but for current version of Ubuntu and you'll succeed