I am trying to split some courses into several sub-courses and keep the user enrolments and activities. So I tried backing up a course and then restoring it prior to deleting the activities and resources not required to make it smaller. However on restoring to a new course I get two duplicate error messages at step 6.Process, of "The role in the backup file cannot be mapped to any of the roles that you are allowed to assign."
There are 5 drop downs under "Restore Role Mappings" with three populated with Manager, Designer and Student and the other two None.
After clicking the Restore button the progress bar stops at 6.85% with an error "error/unknown_context_mapping" and a Continue button which when I click it drops be back to my home page.
I am logged in as admin and successfully backed up and restored a small test course with a few users in, but this issue is happening with all 5 main courses. They will restore without users but then I will lose their completion data when I add them back in.
Please can anyone shed any light?
Thanks in advance for all and any suggestions or assistance.