diff --git a/atlas/models.py b/atlas/models.py
index f34ad77e..84785f5b 100644
--- a/atlas/models.py
+++ b/atlas/models.py
@@ -650,6 +650,9 @@ class CaseCollection(models.Model):
         CidUser, blank=True, related_name="casecollection_exams"
     )
 
+    group = models.ForeignKey("CidUserGroup", on_delete=models.SET_NULL, null=True, blank=True)
+
+
     archive = models.BooleanField(default=False)
     exam_mode = models.BooleanField(default=False)