OK, I've found it - sorry for bothering.
It's a bug in plasma-discover package:
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1088369
EOT.
Regards,
Rafal
On 31.12.2024 11:06 AM, Rafał Lichwała wrote:
Hi,
I've got Debian Trixie installed on three different machines (one
laptop and two PCs) and on all of them there is the same strange issue:
Discover application (the one for app management under KDE Plasma)
shows the green box (at the top of the app window) with text:
"Debian GNU/Linux 9 is now available." - with button "Upgrade Now" on
the right.
Debian 9 is rather old release (I'm running Trixie right now!) and all
the other packages are already updated.
What is going on here?
When I click this "Upgrade Now" button window popups with message:
"Update Issue: There was an issue during the update or installation
process. Please try again later." and "Show details" button says:
"UpgradeSystem not supported by backend".
Anyone knows how to get rid of this strange behavior of Discover app
and whay it is happening?
Regards,
Rafal
