Unable to install the correct software version via apt [duplicate]

I installed KiCad using the Ubuntu Software application. It installed version 4.0.7 which seems to be outdated.

When I started it I encountered cursor ghosting like in the screenshot below.

This is usually fixed by installing the latest build, following

But no matter how hard I try I did not manage to install version 5.16. It always installs 4.0.7.

$ sudo apt list kicad
Listing... Done
kicad/bionic,now 4.0.7+dfsg1-1ubuntu2 amd64 [installed]
$ sudo apt update
Hit:1 bionic InRelease
Hit:2 bionic InRelease
Hit:3 bionic-updates InRelease
Hit:4 bionic-backports InRelease
Hit:5 bionic-security InRelease
Reading package lists... Done
Building dependency tree
Reading state information... Done
All packages are up to date.

the source is being updated so why can't I get the software from it?

How can I get a newer software version from a source other than the official Ubuntu repository?

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1 Answer

If you visit the ppa url, given below, you will find that it has packages of kicad-5.1 for Ubuntu-19.10 and Ubuntu-20.04 only.

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