diff --git a/models b/models
index 61bb54563..e275c273d 100644
--- a/models
+++ b/models
@@ -21,7 +21,7 @@ StudyFeatures
     field         StudyTermsId
     type          StudyFieldType
     semester      Int
-    UniqueUserSubject user degree field
+    -- UniqueUserSubject user degree field -- There exists a counterexample
 StudyDegree
     key           Int
     shorthand     Text Maybe