Getting an error when loading "Email eports" page when a segment no longer exists #16501

Got this report by email:

Key "15" for array with keys ", 8, 9, 2, 3, 4, 13, 14, 23, 27, 1, 11, 24" does not exist. in /home/wp/disk/wordpress/matomo/plugins/ScheduledReports/templates/_listReports.twig 46 using PHP 7.4.8

Error when opening the Email Reports page.

You probably deleted a segment that was used in a report or so. As it's not a regression and bit more work to maybe cleanup reports that contain segments etc maybe can move this out of the RC?

Or as part of this issue we could simply avoid the twig error and then create a new issue to later find a solution for when segments get deleted and it affects other places (which is likely not straight forward)

won't create a separate issue for now for cleaning up reports that are referenced to segments under circumstances