[12:53:09] <arussel> we have a single node replica set. The logs are full of message:
[12:53:14] <arussel> 2018-06-14T04:02:43.263+0000 I REPL [conn23396] Not setting the last OpTime for this Client from { ts: Timestamp(1528948963, 622), t: 1 } to the current system time of { ts: Timestamp(1528948963, 594), t: 1 } as that would be moving the OpTime backwards. This should only happen if there was a rollback recently
[12:53:52] <arussel> there wasn´t any rollback recently (no rollback folder).
[12:54:04] <arussel> What does it mean ? How can I stop it ?