This number comes from the crontab. I have just reset the config backup, and this is in the crontab. 0 1 * * * /etc/webmin/backup-config/backup.pl 149569313723033 Does this jog anyone's memory?
On Ubuntu 16.04, I have been seeing this error persistently. Failed to find backup 140252702320192 at /usr/share/webmin/backup-config/backup.pl line 13. This may have started after upgrading to 1.840, but I'm not sure of that. Any hints on how to fix this?