Course shortname didn't change, it's the same 'menn0204'.
We have tryed one more thing, we have created new folder for course backups and changed auto backup settings to store course backups ONLY in folder and ran cli script. Sheduled task autobackup was Disabled.
We ran it on Jan 15th and all courses backup were made to new folder, next backup was sheduled to Jan 17th 5AM.
On Jan 16th we set course auto backups to "Enabled", we changed back to store course backups in moodledata + new folder. In sheduled task autobackup we changed back to Enabled.
On Jan 17th 5AM auto backups didn't started... And in Sheduled tasks autobackups last run shows September 2nd, 2015... I have no idea why it changes back to this date.
If I try to reset for default values, it shows next run let's say at Jan 18th 9:50AM, but when time comes, it changes next run to ASAP. And last run is September 2nd, 2015.
So maybe this script somehow halt start of auto backups?