reduce logging severity from exception to error

openedx/core/djangoapps/credit/api/eligibility.py

@@ -320,7 +320,7 @@ def remove_credit_requirement_status(username, course_key, req_namespace, req_na
     # but that could cause serious performance issues if many users attempt to
     # lock the row at the same time.
     # Instead, we skip removing the requirement and log an error.
-    if req_to_remove is None:
+    if not req_to_remove:
         log.error(
             (
                 u'Could not remove credit requirement in course "%s" '

openedx/core/djangoapps/credit/models.py

@@ -482,7 +482,13 @@ class CreditRequirementStatus(TimeStampedModel):
             requirement_status = cls.objects.get(username=username, requirement=requirement)
             requirement_status.delete()
         except cls.DoesNotExist:
-            log.exception(u'The requirement status does not exist against the username %s.', username)
+            log_msg = (
+                u'The requirement status {requirement} does not exist for username {username}.'.format(
+                    requirement=requirement,
+                    username=username
+                )
+            )
+            log.error(log_msg)
             return