The documentation for the --days option to koha-run-backups says: --days: the number of days to keep backups around for (default: 2) Sometimes I do the following: 1. Rename a backupfile, e.g. from instance-2019-10-22.sql.gz to instance-2019-10-22-1230.sql.gz 2. Run koha-dump to create a new instance-2019-10-22.sql.gz This reveals that --days does not really care about days at all, just the number of files in the backup dir. This means that if I have adjusted the cronjob to keep backups for 14 days, after the next time it runs, I actually have backups for 13 days.
*** This bug has been marked as a duplicate of bug 30627 ***