I restored a snapshot and I can drop the tables there, so we'll likely
proceed to swap the replicas over tomorrow. I have this corrupted
instance i can continue to debug on if necessary. There seem to be some
other issues now that we're investigating, like a max(timestamp) query on
the old instance is doing a seqscan on all the partitions instead of using
an index that's there, the new instance from the snapshot correctly uses
the index, so I suspect further corruption.
Thanks for your help!
-Michel