diff --git a/posthog/warehouse/api/external_data_schema.py b/posthog/warehouse/api/external_data_schema.py
index 35669885f66..dff4252b34a 100644
--- a/posthog/warehouse/api/external_data_schema.py
+++ b/posthog/warehouse/api/external_data_schema.py
@@ -317,17 +317,12 @@ class ExternalDataSchemaViewset(TeamAndOrgViewSetMixin, viewsets.ModelViewSet):
             ]
         else:
             mapping = PIPELINE_TYPE_INCREMENTAL_FIELDS_MAPPING.get(source.source_type)
-            if not mapping:
+            if mapping is None:
                 return Response(
                     status=status.HTTP_400_BAD_REQUEST,
                     data={"message": f'Source type "{source.source_type}" not found'},
                 )
-            mapping_fields = mapping.get(instance.name)
-            if not mapping_fields:
-                return Response(
-                    status=status.HTTP_400_BAD_REQUEST,
-                    data={"message": f'Incremental fields for "{source.source_type}.{instance.name}" can\'t be found'},
-                )
+            mapping_fields = mapping.get(instance.name, [])
 
             incremental_columns = mapping_fields
 
diff --git a/posthog/warehouse/api/test/test_external_data_schema.py b/posthog/warehouse/api/test/test_external_data_schema.py
index 4babec0833a..e248204d880 100644
--- a/posthog/warehouse/api/test/test_external_data_schema.py
+++ b/posthog/warehouse/api/test/test_external_data_schema.py
@@ -106,7 +106,9 @@ class TestExternalDataSchema(APIBaseTest):
             f"/api/projects/{self.team.pk}/external_data_schemas/{schema.id}/incremental_fields",
         )
 
-        assert response.status_code == 400
+        # should respond but with empty list. Example: Hubspot has not incremental fields but the response should be an empty list so that full refresh is selectable
+        assert response.status_code == 200
+        assert response.json() == []
 
     @pytest.mark.django_db(transaction=True)
     @pytest.mark.asyncio