diff --git a/dashboard/src/layouts/full/vertical-sidebar/NavItem.vue b/dashboard/src/layouts/full/vertical-sidebar/NavItem.vue
index b46a5da5db..4051ccecd4 100644
--- a/dashboard/src/layouts/full/vertical-sidebar/NavItem.vue
+++ b/dashboard/src/layouts/full/vertical-sidebar/NavItem.vue
@@ -38,7 +38,7 @@ const isItemActive = computed(() => {
     </template>
 
     <!-- children -->
-    <template v-for="(child, index) in item.children" :key="index">
+    <template v-for="(child, index) in item.children" :key="child.title || child.to || `child-${index}`">
       <NavItem :item="child" :level="(level || 0) + 1" />
     </template>
   </v-list-group>
diff --git a/dashboard/src/layouts/full/vertical-sidebar/VerticalSidebar.vue b/dashboard/src/layouts/full/vertical-sidebar/VerticalSidebar.vue
index 8dcb2b3e3a..56223bacae 100644
--- a/dashboard/src/layouts/full/vertical-sidebar/VerticalSidebar.vue
+++ b/dashboard/src/layouts/full/vertical-sidebar/VerticalSidebar.vue
@@ -10,26 +10,60 @@ import ChangelogDialog from '@/components/shared/ChangelogDialog.vue';
 const { t, locale } = useI18n();
 
 const customizer = useCustomizerStore();
-const sidebarMenu = shallowRef(sidebarItems);
+
+function collectGroupValues(items, values = new Set()) {
+  items.forEach((item) => {
+    if (item?.children && item.title) {
+      values.add(item.title);
+      collectGroupValues(item.children, values);
+    }
+  });
+  return values;
+}
+
+function sanitizeOpenedItems(items, menuItems) {
+  if (!Array.isArray(items)) {
+    return [];
+  }
+
+  const groupValues = collectGroupValues(menuItems);
+  return items.filter((item) => typeof item === 'string' && groupValues.has(item));
+}
+
+function getInitialOpenedItems(menuItems) {
+  try {
+    const stored = JSON.parse(localStorage.getItem('sidebar_openedItems') || '[]');
+    return sanitizeOpenedItems(stored, menuItems);
+  } catch {
+    return [];
+  }
+}
+
+const sidebarMenu = shallowRef(applySidebarCustomization(sidebarItems));
 
 // 侧边栏分组展开状态持久化
-const openedItems = ref(JSON.parse(localStorage.getItem('sidebar_openedItems') || '[]'));
-watch(openedItems, (val) => localStorage.setItem('sidebar_openedItems', JSON.stringify(val)), { deep: true });
+const openedItems = ref(getInitialOpenedItems(sidebarMenu.value));
+watch(openedItems, (val) => {
+  localStorage.setItem('sidebar_openedItems', JSON.stringify(sanitizeOpenedItems(val, sidebarMenu.value)));
+}, { deep: true });
+
+function refreshSidebarMenu() {
+  sidebarMenu.value = applySidebarCustomization(sidebarItems);
+  openedItems.value = sanitizeOpenedItems(openedItems.value, sidebarMenu.value);
+}
 
 // Apply customization on mount and listen for storage changes
 const handleStorageChange = (e) => {
   if (e.key === 'astrbot_sidebar_customization') {
-    sidebarMenu.value = applySidebarCustomization(sidebarItems);
+    refreshSidebarMenu();
   }
 };
 
 const handleCustomEvent = () => {
-  sidebarMenu.value = applySidebarCustomization(sidebarItems);
+  refreshSidebarMenu();
 };
 
 onMounted(() => {
-  sidebarMenu.value = applySidebarCustomization(sidebarItems);
-  
   window.addEventListener('storage', handleStorageChange);
   window.addEventListener('sidebar-customization-changed', handleCustomEvent);
 });
@@ -255,7 +289,7 @@ function openChangelogDialog() {
   >
     <div class="sidebar-container">
       <v-list class="pa-4 listitem flex-grow-1" v-model:opened="openedItems" :open-strategy="'multiple'">
-        <template v-for="(item, i) in sidebarMenu" :key="i">
+        <template v-for="(item, i) in sidebarMenu" :key="item.title || item.to || `sidebar-item-${i}`">
           <NavItem :item="item" class="leftPadding" />
         </template>
       </v-list>
diff --git a/dashboard/src/utils/sidebarCustomization.js b/dashboard/src/utils/sidebarCustomization.js
index 82423cc596..9023a6769d 100644
--- a/dashboard/src/utils/sidebarCustomization.js
+++ b/dashboard/src/utils/sidebarCustomization.js
@@ -52,6 +52,21 @@ export function clearSidebarCustomization() {
 export function resolveSidebarItems(defaultItems, customization, options = {}) {
   const { cloneItems = false, assembleMoreGroup = false } = options;
 
+  const normalizeKeys = (keys = []) => {
+    const list = Array.isArray(keys) ? keys : [];
+    const deduped = [];
+    const seen = new Set();
+
+    list.forEach((key) => {
+      if (typeof key !== 'string') return;
+      if (seen.has(key)) return;
+      seen.add(key);
+      deduped.push(key);
+    });
+
+    return deduped;
+  };
+
   const all = new Map();
   const defaultMain = [];
   const defaultMore = [];
@@ -70,9 +85,23 @@ export function resolveSidebarItems(defaultItems, customization, options = {}) {
   });
 
   const hasCustomization = Boolean(customization);
-  const mainKeys = hasCustomization ? customization.mainItems || [] : defaultMain;
-  const moreKeys = hasCustomization ? customization.moreItems || [] : defaultMore;
-  const used = hasCustomization ? new Set([...mainKeys, ...moreKeys]) : new Set(defaultMain.concat(defaultMore));
+  let mainKeys = hasCustomization ? normalizeKeys(customization.mainItems || []) : [...defaultMain];
+  let moreKeys = hasCustomization ? normalizeKeys(customization.moreItems || []) : [...defaultMore];
+
+  if (hasCustomization) {
+    mainKeys = mainKeys.filter(title => all.has(title));
+    moreKeys = moreKeys.filter(title => all.has(title));
+  }
+
+  if (hasCustomization) {
+    // 如果同一项同时出现在主区与更多区，主区优先。
+    const mainSet = new Set(mainKeys);
+    moreKeys = moreKeys.filter(title => !mainSet.has(title));
+  }
+
+  const used = hasCustomization
+    ? new Set([...mainKeys, ...moreKeys])
+    : new Set(defaultMain.concat(defaultMore));
 
   const mainItems = mainKeys
     .map(title => all.get(title))
@@ -119,7 +148,13 @@ export function resolveSidebarItems(defaultItems, customization, options = {}) {
     }
   }
 
-  return { mainItems, moreItems, merged };
+  return {
+    mainItems,
+    moreItems,
+    merged,
+    normalizedMainKeys: [...mainKeys],
+    normalizedMoreKeys: [...moreKeys]
+  };
 }
 
 /**
@@ -129,9 +164,29 @@ export function resolveSidebarItems(defaultItems, customization, options = {}) {
  */
 export function applySidebarCustomization(defaultItems) {
   const customization = getSidebarCustomization();
-  const { merged } = resolveSidebarItems(defaultItems, customization, {
+  const {
+    merged,
+    normalizedMainKeys,
+    normalizedMoreKeys
+  } = resolveSidebarItems(defaultItems, customization, {
     cloneItems: true,
     assembleMoreGroup: true
   });
+
+  if (customization) {
+    const rawMainKeys = Array.isArray(customization.mainItems) ? customization.mainItems : [];
+    const rawMoreKeys = Array.isArray(customization.moreItems) ? customization.moreItems : [];
+    const hasChanged =
+      JSON.stringify(rawMainKeys) !== JSON.stringify(normalizedMainKeys) ||
+      JSON.stringify(rawMoreKeys) !== JSON.stringify(normalizedMoreKeys);
+
+    if (hasChanged) {
+      setSidebarCustomization({
+        mainItems: normalizedMainKeys,
+        moreItems: normalizedMoreKeys
+      });
+    }
+  }
+
   return merged || defaultItems;
 }