Is it possible to rebuild a bucket instance?

[Bryan Stillwell <bstillwell@xxxxxxxxxxx>]

I have a cluster running Nautilus where the bucket instance (backups.190) has gone missing:

# radosgw-admin metadata list bucket | grep 'backups.19[0-1]' | sort
    "backups.190",
    "backups.191",

# radosgw-admin metadata list bucket.instance | grep 'backups.19[0-1]' | sort
    "backups.191:00f195a6-c5f9-440f-9deb-62a35bd2b695.5684060.2808",

Is there a way to recreate the bucket instance?  Perhaps by using the bucket instance from backups.191 as a basis?  From what I can tell the bucket index is fine, but since the bucket instance is gone I get this error:

# radosgw-admin bucket list --bucket=backups.190
could not get bucket info for bucket=backups.190
ERROR: could not init bucket: (2) No such file or directory
2020-08-06 16:29:23.457 7f9a625076c0 -1 ERROR: get_bucket_instance_from_oid failed: -2

Thanks,
Bryan
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