diff --git a/src/spaceone/dashboard/manager/domain_dashboard_version_manager.py b/src/spaceone/dashboard/manager/domain_dashboard_version_manager.py
index 82f30a3..c060c32 100644
--- a/src/spaceone/dashboard/manager/domain_dashboard_version_manager.py
+++ b/src/spaceone/dashboard/manager/domain_dashboard_version_manager.py
@@ -24,7 +24,7 @@ def _rollback(version_vo):
             'layouts': params.get('layouts') if params.get('layouts') else domain_dashboard_vo.layouts,
             'variables': params.get('variables') if params.get(
                 'variables') else domain_dashboard_vo.variables,
-            'settings': params.get('settings') if params.get('settings') else domain_dashboard_vo.settings.to_dict(),
+            'settings': params.get('settings') if params.get('settings') else domain_dashboard_vo.settings,
             'variables_schema': params.get('variables_schema') if params.get(
                 'variables_schema') else domain_dashboard_vo.variables_schema,
             'domain_id': domain_dashboard_vo.domain_id