diff --git a/charts/accurate/MIGRATION.md b/charts/accurate/MIGRATION.md
index 32ae194..6aa49f9 100644
--- a/charts/accurate/MIGRATION.md
+++ b/charts/accurate/MIGRATION.md
@@ -16,6 +16,7 @@ Error: rendered manifests contain a resource that already exists. Unable to cont
 ```
 
 Before installing Helm chart, you need to manually delete the resources.
+You do not need to delete Namespace, CRD and SubNamespace custom resources at this time.
 
 ```console
 $ helm template --namespace accurate accurate accurate/accurate | kubectl delete -f -