All /download/repositories/stable/Ubuntuxx.yy/all_ folders appear to be missing 3 out of 4 DEB files that are present for versions earlier than 10.0.3:
I believe this bricked my OwnCloud installation when I ran an upgrade since everything including Apache and PHP has been uninstalled and trying sudo apt install owncloud throws up an error
" we don't ship the "owncloud" meta package and dependency packages anymore in order to prevent breaking other services on a server when upgrading owncloud. therefore only "owncloud-files" is provided which actually does the same as downloading tarball, extracting and replacing in the web server doc root"