Adjusting system time during runtime causes problems?

Running a TDS based application on Win2008R2. 5.1.19 (yes we are updating to 5.2.36 later this week)
The system clock was adjusted back by 5 hours while running. No issue at time, but after an app restart we found we had a corrupted trans log with LSNs lower than those in database files. Had to recover by removing the tran log and clearing LSNs in a database file using db_load -r lsn
Is there something in the trans log contents or writing process that would be affected by a change in system clock backwards?

Hello,
I don't think a clock change could impact the transaction log
files. However it is definitely the case that an anti-virus
software scans should be avoided on Berkeley DB data files
(database, transaction log, region). An anti-virus scan could
be problematic if a page is scanned at the same time the library
code is trying to lock a database for an update. Is there any
chance that an anti-virus scan or some other application happened
at the same time which might have been touching a database page?
Thanks,
Sandra

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