62db5789_Known_Issues__Affected_Users
[Current Issue] Restore: When restoring a Moodle unit with an Attendance activity and user data, Faculty Administrators are getting the following error message: "'unknown_context' mapping" or "Restore: Restore failure with ‘unknown_context’ mapping". [Status] The Attendance activity in Moodle was upgraded to prevent this this issue from occuring in the future however units with Attendance activities that were created prior to 5th September, 2013, will still be effected. [Affected Users] 
Faculty Administrators who restore units with an Attendance activity and user data may receive this error message and their units will not restore correctly. As a workaround, please restore the unit without the Attendance activity or use import instead.
Known Issues
Affected Users