'linux-generic-hwe-18.04', не найденный после обновления 18,04

Начиная с обновления до 18,04 от 16,04 я видел следующее сообщение:

➜  ~ hwe-support-status 

You have packages from the Hardware Enablement Stack (HWE) installed that
are going out of support on 2023-04-30.

To upgrade to a supported (or longer-supported) configuration:

* Upgrade from Ubuntu 16.04 LTS to Ubuntu 18.04 LTS by running:
sudo do-release-upgrade -p

OR

* Switch to the current security-supported stack by running:
sudo apt-get install linux-generic-hwe-18.04

and reboot your system.
➜  ~ hwe-support-status --show-all-unsupported
➜  ~ hwe-support-status --show-replacements
linux-generic-hwe-18.04
➜  ~ sudo apt-get install linux-generic-hwe-18.04
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package linux-generic-hwe-18.04
E: Couldn't find any package by glob 'linux-generic-hwe-18.04'
E: Couldn't find any package by regex 'linux-generic-hwe-18.04'
➜  ~ sudo do-release-upgrade -p
Checking for a new Ubuntu release
No new release found.
➜  ~ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 18.04.1 LTS
Release:        18.04
Codename:       bionic
➜  ~

Кто-либо знает, почему это происходит?