diff --git a/CHANGELOG.md b/CHANGELOG.md
index e359d8987a0..df8a091e61d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -76,6 +76,7 @@ Docs: https://docs.openclaw.ai
 - active-memory: skip the memory sub-agent gracefully instead of logging a confusing allowlist error when no memory plugin (`memory-core` or `memory-lancedb`) is loaded, so active-memory with no memory backend no longer produces misleading "No callable tools remain" warnings in the gateway log. Fixes #77506. Thanks @hclsys.
 - Memory/wiki: preserve representation from both corpora in `corpus=all` searches while backfilling unused result capacity, so memory hits are not starved by numerically higher wiki integer scores. Fixes #77337. Thanks @hclsys.
 - Telegram: clean up tool-only draft previews after assistant message boundaries so transient `Surfacing...` tool-status bubbles do not linger when no matching final preview arrives. Thanks @BunsDev.
+- Telegram: let explicit forum-topic `requireMention` settings override persisted `/activate` and `/deactivate` state, so per-topic mention gates work consistently. Fixes #49864. Thanks @Panniantong.
 - Cron: surface failed isolated-run diagnostics in `cron show`, status, and run history when requested tools are unavailable, so blocked cron runs report the actual tool-policy failure instead of a misleading green result. Fixes #75763. Thanks @RyanSandoval.
 - TUI/escape abort: track the in-flight runId after `chat.send` resolves so pressing Esc during the gap before the first gateway event aborts the run instead of repeatedly printing `no active run`. Fixes #1296. Thanks @Lukavyi and @romneyda.
 - TUI/render: stop the long-token sanitizer from injecting literal spaces inside inline code spans, fenced code blocks, table borders, and bare hyphenated/dotted identifiers, so copied package names, entity IDs, and shell line-continuations stay byte-for-byte intact while narrow-terminal protection still chunks unidentifiable long prose tokens. Fixes #48432, #39505. Thanks @DocOellerson, @xeusoc, @CCcassiusdjs, @akramcodez, @brokemac79, @romneyda.
diff --git a/extensions/telegram/src/bot-message-context.require-mention.test.ts b/extensions/telegram/src/bot-message-context.require-mention.test.ts
new file mode 100644
index 00000000000..deed88a9901
--- /dev/null
+++ b/extensions/telegram/src/bot-message-context.require-mention.test.ts
@@ -0,0 +1,112 @@
+import { getRuntimeConfig } from "openclaw/plugin-sdk/runtime-config-snapshot";
+import { beforeEach, describe, expect, it, vi } from "vitest";
+
+const { defaultRouteConfig } = vi.hoisted(() => ({
+  defaultRouteConfig: {
+    agents: {
+      list: [{ id: "main", default: true }],
+    },
+    channels: { telegram: {} },
+    messages: { groupChat: { mentionPatterns: [] } },
+  },
+}));
+
+vi.mock("openclaw/plugin-sdk/runtime-config-snapshot", async () => {
+  const actual = await vi.importActual<
+    typeof import("openclaw/plugin-sdk/runtime-config-snapshot")
+  >("openclaw/plugin-sdk/runtime-config-snapshot");
+  return {
+    ...actual,
+    getRuntimeConfig: vi.fn(() => defaultRouteConfig),
+  };
+});
+
+const { buildTelegramMessageContextForTest } =
+  await import("./bot-message-context.test-harness.js");
+
+describe("buildTelegramMessageContext requireMention precedence", () => {
+  function buildForumMessage(threadId = 99) {
+    return {
+      message_id: 1,
+      chat: {
+        id: -1001234567890,
+        type: "supergroup" as const,
+        title: "Forum",
+        is_forum: true,
+      },
+      date: 1_700_000_000,
+      text: "hello everyone",
+      message_thread_id: threadId,
+      from: { id: 42, first_name: "Alice" },
+    };
+  }
+
+  beforeEach(() => {
+    vi.mocked(getRuntimeConfig).mockReturnValue(defaultRouteConfig as never);
+  });
+
+  it("lets explicit topic requireMention=false override group requireMention=true", async () => {
+    const ctx = await buildTelegramMessageContextForTest({
+      message: buildForumMessage(),
+      resolveGroupActivation: () => undefined,
+      resolveGroupRequireMention: () => true,
+      resolveTelegramGroupConfig: () => ({
+        groupConfig: { requireMention: true },
+        topicConfig: { requireMention: false },
+      }),
+    });
+
+    expect(ctx).not.toBeNull();
+  });
+
+  it("lets explicit topic requireMention=false override mention activation", async () => {
+    const resolveGroupActivation = vi.fn(() => true);
+
+    const ctx = await buildTelegramMessageContextForTest({
+      message: buildForumMessage(),
+      resolveGroupActivation,
+      resolveGroupRequireMention: () => true,
+      resolveTelegramGroupConfig: () => ({
+        groupConfig: { requireMention: true },
+        topicConfig: { requireMention: false },
+      }),
+    });
+
+    expect(ctx).not.toBeNull();
+    expect(resolveGroupActivation).toHaveBeenCalledWith(
+      expect.objectContaining({
+        chatId: -1001234567890,
+        messageThreadId: 99,
+        sessionKey: "agent:main:telegram:group:-1001234567890:topic:99",
+      }),
+    );
+  });
+
+  it("lets explicit topic requireMention=true override always activation", async () => {
+    const ctx = await buildTelegramMessageContextForTest({
+      message: buildForumMessage(),
+      resolveGroupActivation: () => false,
+      resolveGroupRequireMention: () => false,
+      resolveTelegramGroupConfig: () => ({
+        groupConfig: { requireMention: false },
+        topicConfig: { requireMention: true },
+      }),
+    });
+
+    expect(ctx).toBeNull();
+  });
+
+  it("keeps activation fallback when no topic requireMention is configured", async () => {
+    const ctx = await buildTelegramMessageContextForTest({
+      message: buildForumMessage(),
+      resolveGroupActivation: () => false,
+      resolveGroupRequireMention: () => true,
+      resolveTelegramGroupConfig: () => ({
+        groupConfig: { requireMention: true },
+        topicConfig: { agentId: "main" },
+      }),
+    });
+
+    expect(ctx).not.toBeNull();
+  });
+});
diff --git a/extensions/telegram/src/bot-message-context.ts b/extensions/telegram/src/bot-message-context.ts
index d7c44e39587..e969c668161 100644
--- a/extensions/telegram/src/bot-message-context.ts
+++ b/extensions/telegram/src/bot-message-context.ts
@@ -411,8 +411,8 @@ export const buildTelegramMessageContext = async ({
   });
   const baseRequireMention = resolveGroupRequireMention(chatId);
   const requireMention = firstDefined(
-    activationOverride,
     topicConfig?.requireMention,
+    activationOverride,
     telegramGroupConfig?.requireMention,
     baseRequireMention,
   );