Re: Course backup and Moodle version

I have several sandbox sites and have tested restoring a 4.2.highest backup to a 3.11.highest site.

In attempting to restore a 4.2.highest course backup to a 3.11.highest version, the error below appeared while in first step of restore ... backup details.

 
Invalid get_string() identifier: 'rootsettingxapistate' or component 'backup'. Perhaps you are missing $string['rootsettingxapistate'] = ''; in lang/en/backup.php?

    line 353 of /lib/classes/string_manager_standard.php: call to debugging()
    line 7336 of /lib/moodlelib.php: call to core_string_manager_standard->get_string()
    line 164 of /backup/util/ui/renderer.php: call to get_string()
    line 384 of /backup/util/ui/restore_ui_stage.class.php: call to core_backup_renderer->backup_details()
    line 163 of /backup/restore.php: call to restore_ui_stage_confirm->display()

After stepping through each screen of restore routine, just before the restore process to begin, this notice:

This backup file has been created with Moodle 4.2.1+ (Build: 20230728) (2023042401.08) and it's newer than your currently installed Moodle 3.11.15+ (Build: 20230616) (2021051715.01). This could cause some inconsistencies because backwards compatibility of backup files cannot be guaranteed.

Restore role mappings:
student to student

It did restore!!!! (yes, I am surprised!)

BUT ... the course I was restoring was a no user backup and contained only links to mp4 videos and .txt files.  Other modules may not work!

Best of luck to ya!

'SoS', Ken