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So here is the solution, as suspected the problem was in sources.list.
IDK why my sources pointed to stretch instead of buster.
Found this post: https://forums.bunsenlabs.org/viewtopic.php?id=6915
And my sources.list now looks like this:
deb https://deb.debian.org/debian buster main non-free contrib
# deb-src https://deb.debian.org/debian buster main non-free contrib
## Debian security updates
deb https://deb.debian.org/debian-security buster/updates main contrib non-free
# buster-updates, previously known as 'volatile'
deb https://deb.debian.org/debian buster-updates main contrib non-free
# deb-src https://deb.debian.org/debian buster-updates main contrib non-free
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i updated my ubuntu and it worked for me
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