libsensors5 or libsensors-config upgrade problem

So, you have libsensors4 package that conflicts with libsensors-config. libsensors4 is even not in the package repository of Disco. So, what you need is to replace libsensors4 with libsensors5:

sudo apt update

wget http://mirrors.kernel.org/ubuntu/pool/main/l/lm-sensors/libsensors-config_3.5.0-3ubuntu1_all.deb

wget http://mirrors.kernel.org/ubuntu/pool/main/l/lm-sensors/libsensors5_3.5.0-3ubuntu1_amd64.deb

sudo dpkg -i --force-all libsensors-config_3.5.0-3ubuntu1_all.deb libsensors5_3.5.0-3ubuntu1_amd64.deb

sudo apt remove libsensors4

sudo apt -f install

Update 1:

Open sources.list:

sudo gedit /etc/apt/sources.list

Remove everything there and add these lines:

deb http://archive.ubuntu.com/ubuntu disco main universe restricted multiverse
deb http://archive.ubuntu.com/ubuntu disco-security main universe restricted multiverse
deb http://archive.ubuntu.com/ubuntu disco-updates main universe restricted multiverse

Save and run:

sudo apt update

Then try:

sudo apt upgrade

Update 2:

You have some packages that did not upgrade during the upgrade process.

First of all, remove sysstat as you do not need it now:

sudo dpkg -r --force-all sysstat

Then replace packages with newer version:

wget http://mirrors.kernel.org/ubuntu/pool/main/m/mesa/libgl1-mesa-dri_19.0.2-1ubuntu1_amd64.deb

wget http://mirrors.kernel.org/ubuntu/pool/main/n/net-snmp/libsnmp30_5.7.3+dfsg-5ubuntu1_amd64.deb

sudo dpkg -i --force-all libsnmp30_5.7.3+dfsg-5ubuntu1_amd64.deb libgl1-mesa-dri_19.0.2-1ubuntu1_amd64.deb

sudo apt -f install