Hello Emma,
I have backed-up mdl_backup_courses table and tryed to change 'nextstarttime' timestamp(1452072000) date to: 6th Jan 11:20 EET. I've also set this date in Courses>Backups>Automated backups settings.
I have checked Reports/backups so all backups 'Next backup' value were updated to 6th Jan 11:20.
However Cron didn't started this backup process, so I have used CLI command /usr/bin/php /admin/cli/automated_backups.php
But not all backups were made.. During backup process in Report/backups list were was a lot of 'Unifinished' backups, after backup process finished all these courses backup status changed to 'Error' (~370 courses of 2700 total) and we have 0 'Unfinished'.
Courses which have status 'Error' seems to not even tryed to be backed up, because 'Time taken' dates are still July, August, 2015, etc.
Why could this happened?
Maybe some information is stored in mdl_backup_controllers and it does not allow to perform backup of these courses?
But if I flush mdl_backup_controllers would I loose all backups or not?
Because as I understand mdl_backup_controllers stores data of courses and their backups information.
And if I flush table would old backups will get lost in Moodledata forever? or it would somehow get "regenerated" in mdl_backup_controllers table again?
PS. I can go to any "Error" course and make manual backup in the course. It works fine. So this is no longer Plugin issue I guess.
Thanks,
M.