Looking at the attached "error message" this is not a bug in Ubuntu.
Rather this appears to be a problem with a custom /etc/apt/sources.list
(ie not the sources.list which ships with Ubuntu). You need to edit your
/etc/apt/sources.list file. Please see
https://help.ubuntu.com/community/Repositories/Ubuntu for more
information.
** Changed in: update-manager (Ubuntu)
Status: New => Invalid
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the update manager ask me to do this !!!
https://bugs.launchpad.net/bugs/180081
You received this bug notification because you are a member of Ubuntu
Bugs, which is the bug contact for Ubuntu.
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