Error in timestamp

Trying to correct one of my job archive (via purge-broken-files), I get the following error. What does it mean? And how to correct it?

Failed: Unable to create a new fileset for duplicati-20200830T164225Z.dlist.zip.aes because the resulting timestamp 30/08/2020 18:42:27 is larger than the next timestamp 30/08/2020 18:42:26
Details: System.Exception: Unable to create a new fileset for duplicati-20200830T164225Z.dlist.zip.aes because the resulting timestamp 30/08/2020 18:42:27 is larger than the next timestamp 30/08/2020 18:42:26
   in Duplicati.Library.Main.Operation.PurgeFilesHandler.DoRun(LocalPurgeDatabase db, IFilter filter, Action`3 filtercommand, Single pgoffset, Single pgspan)
   in Duplicati.Library.Main.Operation.PurgeBrokenFilesHandler.Run(IFilter filter)
   in Duplicati.Library.Main.Controller.RunAction[T](T result, String[]& paths, IFilter& filter, Action`1 method)

Error on purge-broken-files is the only other report I see. That had the Duplicati main author get into that, though I didn’t see success was reported. It’s also a somewhat technical dialog that I can’t interpret well.