Hi, looking at Galaxy reports I have 505 datasets which have been deleted

60 days ago but have not been purged. My purging scripts seem to be working correctly in cron. Why do these datasets not get deleted? Is it likely that these are in shared or accessible histories and only deleted by the owner? Any tips would be good, trying to free up some space on our server.

Thanks Shaun Webb -- The University of Edinburgh is a charitable body, registered in Scotland, with registration number SC005336.