masq as instructor to see what courses in what semester are being talked about. grab relevant unique (on instructor main page, or if preferred, drill into the course and get teh course.id in the address line)
Head to cua drill down page (on prod only: https://quest.cns.utexas.edu/institutionadmin/institutions/show?institutioncredential=72276 )
at bottom deposit courseunique.id under course && courseunique (eliminate hanging spaces at the end), view,
select appropriate class with correct instructor,
change semester -> click green + on right to expand this section, move class to target semester requested, edit.
check at top for confirmation of the updated semester: home icon, school name, UPDATED SEMESTER, class name.