Snaptrim_error

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Hi there.

Yesterday I caught that error:
PG_DAMAGED Possible data damage: 2 pgs snaptrim_error
    pg 11.9 is active+clean+snaptrim_error, acting [196,167,32]
    pg 11.127 is active+clean+snaptrim_error, acting [184,138,1]
May it be because the scrub was done when the snapshots were cleaned up?

I tried to restart OSD, then I run deep-scrub and repair, but it didn't solve the problem.

In the documentation the page "Repairing PG inconsistencies" is empty  - http://docs.ceph.com/docs/mimic/rados/operations/pg-repair/,
so I don't know, what else can I do?

Cluster info;
vaersion 12.2.5
25 OSD nodes 
12 OSD per node. The most of them still have filestore as storage backend.

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