doing a package update in BeagleBone Black I get the following error, which was not appearing a few hours ago.
Hit:3 http://deb.debian.org/debian-security buster/updates InRelease
Get:4 http://deb.debian.org/debian buster-backports InRelease [51.4 kB]
Err:5 http://repos.rcn-ee.com/debian buster InRelease
403 Forbidden [IP: 45.33.2.10 80]
Reading package lists... Done
E: Failed to fetch http://repos.rcn-ee.com/debian/dists/buster/InRelease 403 Forbidden [IP: 45.33.2.10 80]
E: The repository 'http://repos.rcn-ee.com/debian buster InRelease' is no longer signed.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.