diff --git a/src/gateway/session-utils.ts b/src/gateway/session-utils.ts
index f974e8394b3..697798a8962 100644
--- a/src/gateway/session-utils.ts
+++ b/src/gateway/session-utils.ts
@@ -731,6 +731,8 @@ export function loadCombinedSessionStoreForGateway(cfg: OpenClawConfig): {
     }
   }
 
+  ensureMainSessionKey(cfg, combined);
+
   const storePath =
     typeof storeConfig === "string" && storeConfig.trim() ? storeConfig.trim() : "(multiple)";
   return { storePath, store: combined };