if i was to hazard a guess… it almost looks like a test i mean why just one…
whatever happened here might be used maliciously… if one could DQ nodes for data that is long deleted.
also the error seems to still be permeating through the network… got another node that has just failed an audit since this morning… might look like it will end up going through all nodes beyond a certain age…
or i got two, but the one is the one i accidentally ran a rsync --delete on after running it for a minut… so might not be relevant.