diff --git a/common/djangoapps/student/models.py b/common/djangoapps/student/models.py
index 8a689bb41f..5b325b7514 100644
--- a/common/djangoapps/student/models.py
+++ b/common/djangoapps/student/models.py
@@ -1162,7 +1162,7 @@ class CourseEnrollment(models.Model):
     course = models.ForeignKey(
         CourseOverview,
         db_constraint=False,
-        on_delete=models.CASCADE,
+        on_delete=models.DO_NOTHING,
     )
 
     @property