Drupal migrate extensions, extra plugins. Recommended Yes Module page https://www.drupal.org/project/migrate_plus Module tags #Extension Stability Stable Tags #Migration Issues Document how to append a value to a reference field Articles Upgrading Drupal Sites Module issues Document how to append a value to a reference field #Migration [Issue] Provide an optional migration path for sites using files/images to media entities [Article] Migrate referenced children of same content type [Module] Migrate [Article] Migrate hierarchical content [Article] NodeComplete Migration Source