diff --git a/bitbake/lib/toaster/orm/models.py b/bitbake/lib/toaster/orm/models.py
index f5529e2541..9851c92b71 100644
--- a/bitbake/lib/toaster/orm/models.py
+++ b/bitbake/lib/toaster/orm/models.py
@@ -222,7 +222,7 @@ class Project(models.Model):
         if pk is False:
             return layer_versions
         else:
-            return layer_versions.values_list('pk', flat=True)
+            return layer_versions.values_list('layercommit__pk', flat=True)
 
 
     def get_available_machines(self):