diff --git a/scripts/install-dirigent-openclaw.mjs b/scripts/install-dirigent-openclaw.mjs
index 25fade3..2623702 100755
--- a/scripts/install-dirigent-openclaw.mjs
+++ b/scripts/install-dirigent-openclaw.mjs
@@ -122,6 +122,7 @@ function findLatestInstallRecord() {
 
 // Deep clone
 function clone(v) {
+  if (v === undefined) return undefined;
   return JSON.parse(JSON.stringify(v));
 }