ParseException: Reference number must start with MM-
File "rest_framework/views.py", line 502, in dispatch
response = handler(request, *args, **kwargs)
File "ecommerce/views.py", line 158, in post
order = get_new_order_by_reference_number(reference_number)
File "ecommerce/api.py", line 278, in get_new_order_by_reference_number
raise ParseException("Reference number must start with {}".format(REFERENCE_NUMBER_PREFIX))
An exception was intercepted by custom_exception_handler
Sentry Issue: MICROMASTERS-5ZT