don't error out to user programs with really old course runs not in lms

openedx/core/djangoapps/programs/utils.py

@@ -494,10 +494,19 @@ class ProgramDataExtender(object):
             for course_run in course['course_runs']:
                 # State to be shared across handlers.
                 self.course_run_key = CourseKey.from_string(course_run['key'])
-                self.course_overview = CourseOverview.get_from_id(self.course_run_key)
-                self.enrollment_start = self.course_overview.enrollment_start or DEFAULT_ENROLLMENT_START_DATE
 
-                self._execute('_attach_course_run', course_run)
+                # Some (old) course runs may exist for a program which do not exist in LMS. In that case,
+                # continue without the course run.
+                try:
+                    self.course_overview = CourseOverview.get_from_id(self.course_run_key)
+                except CourseOverview.DoesNotExist:
+                    log.warning('Failed to get course overview for course run key: %s',
+                                self.course_run.get('key'),
+                                exec_info=True)
+                else:
+                    self.enrollment_start = self.course_overview.enrollment_start or DEFAULT_ENROLLMENT_START_DATE
+
+                    self._execute('_attach_course_run', course_run)
 
     def _attach_course_run_certificate_url(self, run_mode):
         certificate_data = certificate_api.certificate_downloadable_status(self.user, self.course_run_key)