diff --git a/cmd/backup/app.go b/cmd/backup/app.go
index f261e0ab..7393dca6 100644
--- a/cmd/backup/app.go
+++ b/cmd/backup/app.go
@@ -17,6 +17,7 @@ import (
 
 	"github.com/easysoft/qcadmin/internal/api/cne"
 	"github.com/easysoft/qcadmin/internal/pkg/util/factory"
+	"github.com/easysoft/qcadmin/internal/pkg/util/kutil"
 	"github.com/easysoft/qcadmin/internal/pkg/util/output"
 )
 
@@ -43,6 +44,9 @@ func newCmdBackupAppCreate(f factory.Factory) *cobra.Command {
 			if len(app) == 0 || len(ns) == 0 {
 				return errors.New("missing app or ns")
 			}
+			if !kutil.ValidNamespace(ns) {
+				return errors.New("allow support quickon prefix namespace")
+			}
 			return nil
 		},
 		Run: func(cmd *cobra.Command, args []string) {
@@ -99,6 +103,9 @@ func newCmdBackupAppList(f factory.Factory) *cobra.Command {
 			if len(app) == 0 || len(ns) == 0 {
 				return errors.New("missing app or ns")
 			}
+			if !kutil.ValidNamespace(ns) {
+				return errors.New("allow support quickon prefix namespace")
+			}
 			return nil
 		},
 		RunE: func(cmd *cobra.Command, args []string) error {
diff --git a/internal/pkg/util/kutil/kutil.go b/internal/pkg/util/kutil/kutil.go
index f0258cb2..5e63de84 100644
--- a/internal/pkg/util/kutil/kutil.go
+++ b/internal/pkg/util/kutil/kutil.go
@@ -86,3 +86,13 @@ func GetConsoleURL(cfg *config.Config) string {
 	}
 	return domain
 }
+
+// ValidNamespace valid namespace
+func ValidNamespace(ns string) bool {
+	switch ns {
+	case common.DefaultAppNamespace, common.DefaultSystemNamespace:
+		return true
+	default:
+		return false
+	}
+}