AFM matches log id 31380 to report issues. To avoid false positives we should use a new log id 91272XX across the codebase when the stack trace is only printed for informational purposes.
UPDATE: I think it makes more sense to just remove this printStackTrace call.
SERVER-57476 Operation may block on prepare conflict while holding oplog slot, stalling replication indefinitely
SERVER-93049 Better WCE message coming from a prepare conflict