diff --git a/extensions/zalo/src/onboarding.ts b/extensions/zalo/src/onboarding.ts
index dec07d9ccf..0b845008d5 100644
--- a/extensions/zalo/src/onboarding.ts
+++ b/extensions/zalo/src/onboarding.ts
@@ -148,11 +148,7 @@ async function promptZaloAllowFrom(params: {
     },
   });
   const normalized = String(entry).trim();
-  const merged = [
-    ...existingAllowFrom.map((item) => String(item).trim()).filter(Boolean),
-    normalized,
-  ];
-  const unique = mergeAllowFromEntries(undefined, merged);
+  const unique = mergeAllowFromEntries(existingAllowFrom, [normalized]);
 
   if (accountId === DEFAULT_ACCOUNT_ID) {
     return {
diff --git a/extensions/zalouser/src/onboarding.ts b/extensions/zalouser/src/onboarding.ts
index 6e69599eac..f4dcc55cb7 100644
--- a/extensions/zalouser/src/onboarding.ts
+++ b/extensions/zalouser/src/onboarding.ts
@@ -122,11 +122,7 @@ async function promptZalouserAllowFrom(params: {
       );
       continue;
     }
-    const merged = [
-      ...existingAllowFrom.map((item) => String(item).trim()).filter(Boolean),
-      ...(results.filter(Boolean) as string[]),
-    ];
-    const unique = mergeAllowFromEntries(undefined, merged);
+    const unique = mergeAllowFromEntries(existingAllowFrom, results.filter(Boolean) as string[]);
     if (accountId === DEFAULT_ACCOUNT_ID) {
       return {
         ...cfg,