abaddon
Penultimate Amazing
Roll Forward should fix that. I have had to do it once. Go back to your known good backup then roll forward to re-apply the log files.
According to the announcement on SGU there was a daily backup schedule. So in theory, that would require little effort to go back to the last good backup. Rolling forward the trans logs would be a matter of choice at that point. Lose a couple of days activity or fiddle about trying to recover as much as possible. Cost benefit calculation. The loss of a day or two of activity would not be disaster on SGU. It's not bank records or medical records, after all.