Comment 26 for bug 2008212

I tried the same here - it seems just a matter of choice of package;
python3.6 is a security update, and those are never phased, so even forcing it won't work.

I simulated it with `parted` (from proposed) and I see it works on Bionic.

Verification for bionic:

apt show parted 2>&1 | grep Phase
Phased-Update-Percentage: 0

# Currently installed version:
apt-cache policy update-notifier-common | head -n 3
update-notifier-common:
  Installed: 3.192.1.18
  Candidate: 3.192.1.19

/usr/lib/update-notifier/apt-check -p 2>&1 | grep parted
libparted2
parted

# after upgrade to -proposed:
apt-cache policy update-notifier-common | head -n 3
update-notifier-common:
  Installed: 3.192.1.19
  Candidate: 3.192.1.19

/usr/lib/update-notifier/apt-check -p 2>&1 | grep advantage
libparted2
#

# phased out parted not listed

Behavior consistent with the test plan.