Ceph Error

root@pve4:~# ceph -s
  cluster:
    id:     87dd1f45-1cce-4826-8098-db1770210b97
    health: HEALTH_ERR
            1/409925 objects unfound (0.000%)
            Possible data damage: 1 pg recovery_unfound
            Degraded data redundancy: 3/1229775 objects degraded (0.000%), 1 pg degraded

  services:
    mon: 4 daemons, quorum pve4,pve5,pve6,pve7 (age 2d)
    mgr: pve5(active, since 5M), standbys: pve6, pve4, pve7
    osd: 16 osds: 16 up (since 5M), 16 in (since 12M)

  data:
    pools:   3 pools, 512 pgs
    objects: 409.93k objects, 1.6 TiB
    usage:   4.7 TiB used, 8.0 TiB / 13 TiB avail
    pgs:     3/1229775 objects degraded (0.000%)
             1/409925 objects unfound (0.000%)
             511 active+clean
             1   active+recovery_unfound+degraded+repair

  io:
    client:   0 B/s rd, 0 B/s wr, 0 op/s rd, 0 op/s wr

root@pve4:~# ceph health detail
HEALTH_ERR 1/409925 objects unfound (0.000%); Possible data damage: 1 pg recovery_unfound; Degraded data redundancy: 3/1229775 objects degraded (0.000%), 1 pg degraded
OBJECT_UNFOUND 1/409925 objects unfound (0.000%)
    pg 2.9d has 1 unfound objects
PG_DAMAGED Possible data damage: 1 pg recovery_unfound
    pg 2.9d is active+recovery_unfound+degraded+repair, acting [1,13,9], 1 unfound
PG_DEGRADED Degraded data redundancy: 3/1229775 objects degraded (0.000%), 1 pg degraded
    pg 2.9d is active+recovery_unfound+degraded+repair, acting [1,13,9], 1 unfound

root@pve4:~# ceph pg dump_json pools |grep 2.9d
dumped all
2.9d       1310                  1        3         0       1 5494145024           0          0 3031     3031 active+recovery_unfound+degraded+repair 2021-03-12 10:47:48.576627  181'2094733  181:2498995  [1,13,9]          1  [1,13,9]              1  167'2091303 2021-03-12 10:47:47.478370     167'2091303 2021-03-12 10:47:47.478370             0