'linux-generic-hwe-18.04' not found after upgrade to 18.04

No specific hwe or lts linux-image is yet required for 18.04 (so it doesn't exists). Ensure first that linux-image-generic image is installed:

 apt install linux-image-generic

Then remove old hwe or lts linux images, in my case I did:

apt purge linux-image-generic-lts-xenial

Then the hwe-support-status command returns a clean empty response.

I had an old unsupported Linux kernel installed, discovered using

# apt policy linux-generic\*

Remember to run

# apt autoremove

to remove any unused dependencies which may also be picked up by hwe-support-status.

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