clean up stale pg?

I recently upgraded from Luminous to Mimic (13.2.6) and now I find that I have a single pg that is stale and cannot be repaired or cleaned up. I had to remove several OSDs due to some issues after the upgrade and now I have this one pg that is in a state that I cannot get rid of. Any hints on how to fix this? $ ceph pg dump_stuck PG_STAT STATE UP UP_PRIMARY ACTING ACTING_PRIMARY 54.163 stale+active+undersized+degraded [94,63] 94 [94,63] 94 $ ceph pg 54.163 query Error ENOENT: i don't have pgid 54.163 Both osd.94 and osd.63 are OK, pool 54 (cephfs_metadata) is a 3-copy pool, so it looks like the 3rd copy of the pg is missing. The logs for osd.94 and osd.63 show this when I grep for the missing pg: 2019-07-02 14:14:51.632 7fb796f54700 1 osd.63 pg_epoch: 173782 pg[54.163( v 173599'29032 (165339'27516,173599'29032] local-lis/les=173715/173716 n=1213 ec=56712/56712 lis/c 173715/173657 les/c/f 173716/173658/0 173782/173782/173770) [94,63] r=1 lpr=173782 pi=[173657,173782)/1 crt=173599'29032 lcod 0'0 unknown NOTIFY mbc={}] state<Start>: transitioning to Stray thanks, Wyllys Ingersoll