diff --git a/CHANGELOG.md b/CHANGELOG.md
index 62e0835d0b..57bcf70614 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -45,6 +45,7 @@ Docs: https://docs.openclaw.ai
 - Telegram: route non-abort slash commands on the normal chat/topic sequential lane while keeping true abort requests (`/stop`, `stop`) on the control lane, preventing command/reply race conditions from control-lane bypass. (#17899) Thanks @obviyus.
 - Telegram: ignore `<media:...>` placeholder lines when extracting `MEDIA:` tool-result paths, preventing false local-file reads and dropped replies. (#18510) Thanks @yinghaosang.
 - Telegram: skip retries when inbound media `getFile` fails with Telegram's 20MB limit and continue processing message text, avoiding dropped messages for oversized attachments. (#18531) Thanks @brandonwise.
+- Telegram: clear stored polling offsets when bot tokens change or accounts are deleted, preventing stale offsets after token rotations. (#18233)
 - Auto-reply/TTS: keep tool-result media delivery enabled in group chats and native command sessions (while still suppressing tool summary text) so `NO_REPLY` follow-ups do not drop successful TTS audio. (#17991) Thanks @zerone0x.
 - Agents/Tools: deliver tool-result media even when verbose tool output is off so media attachments are not dropped. (#16679)
 - Discord: optimize reaction notification handling to skip unnecessary message fetches in `off`/`all`/`allowlist` modes, streamline reaction routing, and improve reaction emoji formatting. (#18248) Thanks @thewilloftheshadow and @victorGPT.
diff --git a/src/commands/channels.add.test.ts b/src/commands/channels.add.test.ts
new file mode 100644
index 0000000000..8cabd70039
--- /dev/null
+++ b/src/commands/channels.add.test.ts
@@ -0,0 +1,84 @@
+import { beforeEach, describe, expect, it, vi } from "vitest";
+import { setDefaultChannelPluginRegistryForTests } from "./channel-test-helpers.js";
+import { baseConfigSnapshot, createTestRuntime } from "./test-runtime-config-helpers.js";
+
+const configMocks = vi.hoisted(() => ({
+  readConfigFileSnapshot: vi.fn(),
+  writeConfigFile: vi.fn().mockResolvedValue(undefined),
+}));
+
+const offsetMocks = vi.hoisted(() => ({
+  deleteTelegramUpdateOffset: vi.fn().mockResolvedValue(undefined),
+}));
+
+vi.mock("../config/config.js", async (importOriginal) => {
+  const actual = await importOriginal<typeof import("../config/config.js")>();
+  return {
+    ...actual,
+    readConfigFileSnapshot: configMocks.readConfigFileSnapshot,
+    writeConfigFile: configMocks.writeConfigFile,
+  };
+});
+
+vi.mock("../telegram/update-offset-store.js", async (importOriginal) => {
+  const actual = await importOriginal<typeof import("../telegram/update-offset-store.js")>();
+  return {
+    ...actual,
+    deleteTelegramUpdateOffset: offsetMocks.deleteTelegramUpdateOffset,
+  };
+});
+
+import { channelsAddCommand } from "./channels.js";
+
+const runtime = createTestRuntime();
+
+describe("channelsAddCommand", () => {
+  beforeEach(() => {
+    configMocks.readConfigFileSnapshot.mockReset();
+    configMocks.writeConfigFile.mockClear();
+    offsetMocks.deleteTelegramUpdateOffset.mockClear();
+    runtime.log.mockClear();
+    runtime.error.mockClear();
+    runtime.exit.mockClear();
+    setDefaultChannelPluginRegistryForTests();
+  });
+
+  it("clears telegram update offsets when the token changes", async () => {
+    configMocks.readConfigFileSnapshot.mockResolvedValue({
+      ...baseConfigSnapshot,
+      config: {
+        channels: {
+          telegram: { botToken: "old-token", enabled: true },
+        },
+      },
+    });
+
+    await channelsAddCommand(
+      { channel: "telegram", account: "default", token: "new-token" },
+      runtime,
+      { hasFlags: true },
+    );
+
+    expect(offsetMocks.deleteTelegramUpdateOffset).toHaveBeenCalledTimes(1);
+    expect(offsetMocks.deleteTelegramUpdateOffset).toHaveBeenCalledWith({ accountId: "default" });
+  });
+
+  it("does not clear telegram update offsets when the token is unchanged", async () => {
+    configMocks.readConfigFileSnapshot.mockResolvedValue({
+      ...baseConfigSnapshot,
+      config: {
+        channels: {
+          telegram: { botToken: "same-token", enabled: true },
+        },
+      },
+    });
+
+    await channelsAddCommand(
+      { channel: "telegram", account: "default", token: "same-token" },
+      runtime,
+      { hasFlags: true },
+    );
+
+    expect(offsetMocks.deleteTelegramUpdateOffset).not.toHaveBeenCalled();
+  });
+});
diff --git a/src/commands/channels/add.ts b/src/commands/channels/add.ts
index b1b2060632..c086433be5 100644
--- a/src/commands/channels/add.ts
+++ b/src/commands/channels/add.ts
@@ -1,13 +1,15 @@
+import type { ChannelId, ChannelSetupInput } from "../../channels/plugins/types.js";
+import type { ChannelChoice } from "../onboard-types.js";
 import { resolveAgentWorkspaceDir, resolveDefaultAgentId } from "../../agents/agent-scope.js";
 import { listChannelPluginCatalogEntries } from "../../channels/plugins/catalog.js";
 import { getChannelPlugin, normalizeChannelId } from "../../channels/plugins/index.js";
-import type { ChannelId, ChannelSetupInput } from "../../channels/plugins/types.js";
 import { writeConfigFile, type OpenClawConfig } from "../../config/config.js";
 import { DEFAULT_ACCOUNT_ID, normalizeAccountId } from "../../routing/session-key.js";
 import { defaultRuntime, type RuntimeEnv } from "../../runtime.js";
+import { resolveTelegramAccount } from "../../telegram/accounts.js";
+import { deleteTelegramUpdateOffset } from "../../telegram/update-offset-store.js";
 import { createClackPrompter } from "../../wizard/clack-prompter.js";
 import { setupChannels } from "../onboard-channels.js";
-import type { ChannelChoice } from "../onboard-types.js";
 import {
   ensureOnboardingPluginInstalled,
   reloadOnboardingPluginRegistry,
@@ -209,6 +211,11 @@ export async function channelsAddCommand(
     return;
   }
 
+  const previousTelegramToken =
+    channel === "telegram"
+      ? resolveTelegramAccount({ cfg: nextConfig, accountId }).token.trim()
+      : "";
+
   nextConfig = applyChannelAccountConfig({
     cfg: nextConfig,
     channel,
@@ -216,6 +223,14 @@ export async function channelsAddCommand(
     input,
   });
 
+  if (channel === "telegram") {
+    const nextTelegramToken = resolveTelegramAccount({ cfg: nextConfig, accountId }).token.trim();
+    if (previousTelegramToken !== nextTelegramToken) {
+      // Clear stale polling offsets after Telegram token rotation.
+      await deleteTelegramUpdateOffset({ accountId });
+    }
+  }
+
   await writeConfigFile(nextConfig);
   runtime.log(`Added ${channelLabel(channel)} account "${accountId}".`);
 }