Comment 9 for bug 687752

So in summary, Soyuz blocks uploading of some files based on the hashes of files previously uploaded into Soyuz. When we changed how deleted and expired files where handled, we broke this detection as older files are aggressively expired and the hashes removed from the database. Soyuz can no longer reliably ask 'was this file previously uploaded into Soyuz with a different hash?'.

This change was made quite some time ago and recovering the hashes from backups will be time consuming. Do we need to do this?