diff --git a/ylgamehall/Source/Resource/SubGameDirectoryStore.swift b/ylgamehall/Source/Resource/SubGameDirectoryStore.swift
index 3ba58a4..2dfb29f 100644
--- a/ylgamehall/Source/Resource/SubGameDirectoryStore.swift
+++ b/ylgamehall/Source/Resource/SubGameDirectoryStore.swift
@@ -16,7 +16,7 @@ import Foundation
 /// UserDefaults 线程安全，所有方法 nonisolated 让 actor / MainActor / 后台线程都能直接调用。
 public enum SubGameDirectoryStore {
 
-    private static let keyPrefix = "ylgh.subGameDir."
+    nonisolated private static let keyPrefix = "ylgh.subGameDir."
 
     /// 当前实际目录名。已持久化 → 返回持久化值；未持久化 → 返回 directory 本身
     /// （对应 msext NSUserDefaults 缺 key 时 gamefilepath = gamename 的默认）。