diff --git a/deployment/hasura/metadata/databases/tables/merlin/external_source.yaml b/deployment/hasura/metadata/databases/tables/merlin/external_source.yaml
index 2e6a5e3d21..16dc7607d7 100644
--- a/deployment/hasura/metadata/databases/tables/merlin/external_source.yaml
+++ b/deployment/hasura/metadata/databases/tables/merlin/external_source.yaml
@@ -17,6 +17,9 @@ object_relationships:
   - name: external_source_type
     using:
       foreign_key_constraint_on: source_type_name
+  - name: derivation_group
+    using:
+      foreign_key_constraint_on: derivation_group_name
 select_permissions:
   - role: aerie_admin
     permission: