Two mirror URL where reproducable the bugreport is possible
http://mirror1.hs-esslingen.de/pub/Mirrors/archive.raspbian.org/raspbian/ http://ftp.gwdg.de/pub/linux/debian/raspbian/raspbian/ <screendump> stappers@trancilo:~/Downloads $ sudo debootstrap --arch=armhf --foreign --verbose --keyring=raspbian-archive-keyring-20120528.2/raspbian.public.key.gpg buster /tmp/debootstrap-test/ http://mirror1.hs-esslingen.de/pub/Mirrors/archive.raspbian.org/raspbian/ I: Retrieving InRelease I: Retrieving Release E: Failed getting release file http://mirror1.hs-esslingen.de/pub/Mirrors/archive.raspbian.org/raspbian/dists/buster/Release stappers@trancilo:~/Downloads $ sudo debootstrap --arch=armhf --foreign --verbose --keyring=raspbian-archive-keyring-20120528.2/raspbian.public.key.gpg buster /tmp/debootstrap-test/ http://ftp.gwdg.de/pub/linux/debian/raspbian/raspbian/ I: Retrieving InRelease I: Retrieving Release E: Failed getting release file http://ftp.gwdg.de/pub/linux/debian/raspbian/raspbian/dists/buster/Release stappers@trancilo:~/Downloads $ </screendump>