diff --git a/core/modules/node/migration_templates/d6_node.yml b/core/modules/node/migration_templates/d6_node.yml
index 56d0459..dcfae61 100644
--- a/core/modules/node/migration_templates/d6_node.yml
+++ b/core/modules/node/migration_templates/d6_node.yml
@@ -49,6 +49,7 @@ migration_dependencies:
     - d6_node_settings
     - d6_filter_format
   optional:
+    - d6_vocabulary_field_instance
     - d6_field_instance_widget_settings
     - d6_field_formatter_settings
     - d6_upload_field_instance
diff --git a/core/modules/node/src/Plugin/migrate/D6NodeDeriver.php b/core/modules/node/src/Plugin/migrate/D6NodeDeriver.php
index ae50524..904c2f8 100644
--- a/core/modules/node/src/Plugin/migrate/D6NodeDeriver.php
+++ b/core/modules/node/src/Plugin/migrate/D6NodeDeriver.php
@@ -14,6 +14,8 @@
 
 /**
  * Deriver for Drupal 6 node and node revision migrations based on node types.
+ *
+ * @internal
  */
 class D6NodeDeriver extends DeriverBase implements ContainerDeriverInterface {
   use MigrationDeriverTrait;