Fixed InvalidKeyError on change enrollment.
LMS-11132
update get_parent_location method to select non-orphan parents from multiple parents
STUD-2007
Merge pull request #4985 from edx/waheed/lms11132-fix-invalid-key-error-change-enrollment

Fixed InvalidKeyError on change enrollment.
Merge pull request #4805 from edx/zub/bugfix/std2007-jumptoid

update get_parent_location method to select non-orphan parents from mult...