diff --git a/vscode/src/forge/github/provider.test.ts b/vscode/src/forge/github/provider.test.ts
index 2811121..8ddba6c 100644
--- a/vscode/src/forge/github/provider.test.ts
+++ b/vscode/src/forge/github/provider.test.ts
@@ -148,6 +148,11 @@ describe('工单', () => {
     expect(await p.getIssue(9)).toBeNull()
   })
 
+  it('工单已被删除（410）也返回 null', async () => {
+    stubFetch(new Response('{"message":"This issue was deleted"}', { status: 410 }))
+    expect(await provider().getIssue(5)).toBeNull()
+  })
+
   it('其它失败照常抛 ForgeApiError', async () => {
     stubFetch(new Response('boom', { status: 500 }))
     await expect(provider().getIssue(1)).rejects.toBeInstanceOf(ForgeApiError)
diff --git a/vscode/src/forge/github/provider.ts b/vscode/src/forge/github/provider.ts
index 96fbea2..a6c5e0c 100644
--- a/vscode/src/forge/github/provider.ts
+++ b/vscode/src/forge/github/provider.ts
@@ -251,14 +251,14 @@ export class GitHubProvider implements ForgeProvider {
     return raws.filter(raw => raw.pull_request === undefined).map(toIssue)
   }
 
-  /** 这个编号是 PR 时也返回 `null`。 */
+  /** 工单不存在（404）、已被删除（GitHub 回 410）或这个编号其实是 PR 时都返回 `null`。 */
   async getIssue(issueNumber: number): Promise<ForgeIssue | null> {
     try {
       const raw = await this.rawIssue(issueNumber)
       return raw.pull_request === undefined ? toIssue(raw) : null
     }
     catch (err) {
-      if (err instanceof ForgeApiError && err.status === 404)
+      if (err instanceof ForgeApiError && (err.status === 404 || err.status === 410))
         return null
       throw err
     }