update required (red triangle) never disappears

[MikeR]

Ubuntu 20.04 fully updated, manually checked for updates every morning.
Indicator Applet Complete version 12.10.1

As part of the Indicator applet there is a red triangle enclosing an exclamation sign (upper panel.)
Clicking the icon displays the message "...Update manually by selecting 'Show updates' ..."
Selecting "Show updates" displays a box with the text "The software on this computer is up to date"
However the red triangle icon remains.
Selecting any other option in the drop-down menu has a similar non-effect,
It clears after reboot, and after an indeterminate time reappears.

I don't need or want this icon. How can I get rid of it?

[MikeR (mike-rechtman)]

list of attempts to solve this in
https://answers.launchpad.net/ubuntu/+source/indicator-applet/+question/705780

[MikeR (mike-rechtman)]

see
https://answers.launchpad.net/ubuntu/+source/indicator-applet/+question/705780