diff --git a/src/frontend/src/store.ts b/src/frontend/src/store.ts
index b5103d9..0242632 100644
--- a/src/frontend/src/store.ts
+++ b/src/frontend/src/store.ts
@@ -546,10 +546,13 @@ export const useStore = create<AppStore>((set, get) => ({
       const data = await api.projects();
       set({ projects: data.projects });
       const s = get();
-      if (!s.selectedProjectId && Object.keys(data.projects).length > 0) {
-        const firstPid = Object.keys(data.projects)[0];
-        set({ selectedProjectId: firstPid });
-        setApiProjectId(firstPid);
+      // 如果当前 selectedProjectId 不在项目列表里，重新选择
+      if (!s.selectedProjectId || !(s.selectedProjectId in data.projects)) {
+        if (Object.keys(data.projects).length > 0) {
+          const firstPid = Object.keys(data.projects)[0];
+          set({ selectedProjectId: firstPid });
+          setApiProjectId(firstPid);
+        }
       }
     } catch {
       // silently fail