diff --git a/README.md b/README.md
index f8b8cc7..df6f9f7 100644
--- a/README.md
+++ b/README.md
@@ -360,7 +360,7 @@ sudo systemctl start tsmusicbot
 - 网页端：设置 → 命令权限，填写允许的服务器组 ID（逗号分隔），保存即时生效。
 - 或编辑 `config.json` 的 `adminGroups`（数字数组），例如 `"adminGroups": [6, 8]`。
 
-填入任意服务器组 ID 后，限制立即开启：只有属于这些组之一的用户才能运行受限命令，其他人会收到「⛔ 需要管理员权限」的提示。
+填入任意服务器组 ID 后，限制立即开启：只有属于这些组之一的用户才能运行受限命令，其他人会收到「⛔ 需要管理员权限（该命令仅限管理员服务器组）」的提示。
 
 > 提示（fail-closed）：当受限命令来自一个机器人当前看不到其服务器组的发送者（例如不在机器人所在频道的私聊），机器人会尝试查询其分组；若仍无法确定，则拒绝执行。
 
diff --git a/src/bot/commands.test.ts b/src/bot/commands.test.ts
index 7f502f6..8a6fb41 100644
--- a/src/bot/commands.test.ts
+++ b/src/bot/commands.test.ts
@@ -1,6 +1,5 @@
 import { describe, it, expect } from "vitest";
-import { parseCommand } from "./commands.js";
-import { canRunCommand, isAdminCommand } from "./commands.js";
+import { parseCommand, canRunCommand, isAdminCommand } from "./commands.js";
 
 describe("Command Parser", () => {
   it("parses simple command", () => {
diff --git a/src/data/config.test.ts b/src/data/config.test.ts
index 692ab14..2f014e4 100644
--- a/src/data/config.test.ts
+++ b/src/data/config.test.ts
@@ -177,3 +177,29 @@ describe("guestMode config", () => {
     });
   });
 });
+
+describe("adminGroups normalization", () => {
+  function loadAdminGroups(raw: unknown) {
+    const dir = mkdtempSync(join(tmpdir(), "tsmb-cfg-"));
+    const p = join(dir, "config.json");
+    writeFileSync(p, JSON.stringify(raw));
+    try {
+      return loadConfig(p).adminGroups;
+    } finally {
+      rmSync(dir, { recursive: true, force: true });
+    }
+  }
+
+  it("defaults to [] when absent", () => {
+    expect(loadAdminGroups({})).toEqual([]);
+  });
+  it("keeps valid non-negative integers", () => {
+    expect(loadAdminGroups({ adminGroups: [6, 8] })).toEqual([6, 8]);
+  });
+  it("filters out negatives, non-integers and non-numbers", () => {
+    expect(loadAdminGroups({ adminGroups: [6, -1, 2.5, "8", null] })).toEqual([6]);
+  });
+  it("a non-array value falls back to the default [] (no crash)", () => {
+    expect(loadAdminGroups({ adminGroups: "6" })).toEqual([]);
+  });
+});
diff --git a/src/data/config.ts b/src/data/config.ts
index 2c2291d..bd1b788 100755
--- a/src/data/config.ts
+++ b/src/data/config.ts
@@ -104,9 +104,20 @@ export function loadConfig(path: string): BotConfig {
       gm.permissions[f] = gm.permissions[f] === true;
     }
 
+    // Sanitize adminGroups on load too: the WebUI write path filters it, but a
+    // hand-edited / legacy / corrupt config.json reaches the command gate
+    // directly. Keep only non-negative integers; a non-array falls back to the
+    // default []. Mirrors the guestMode sanitization above.
+    const adminGroups = Array.isArray(partial.adminGroups)
+      ? partial.adminGroups.filter(
+          (g): g is number => typeof g === "number" && Number.isInteger(g) && g >= 0,
+        )
+      : defaults.adminGroups;
+
     return {
       ...defaults,
       ...partial,
+      adminGroups,
       guestMode: gm,
     };
   } catch {