Node.js 错误\u HTTP\u头\u已发送：无法设置cookie

这是我的密码

import { Request, Response } from "express";
import { database } from "firebase-admin";

async function updatereAccessToken(
  req: Request,
  res: Response,
  db: database.Database
) {
  try {

    await db
      .ref(
        `/token/${"-MUQK0wGmrjPVBdFH7gr"}/${"90417abf-b085-4072-b4ec-f009b5fe4016"}`
      )
      .set("90417abf-b085-4072-b4ec-f009b5fe4016");

    
    await db
      .ref(
        `/token/${"-MUQK0wGmrjPVBdFH7gr"}/${"90417abf-b085-4072-b4ec-f009b5fe4016"}`
      )
      .set("90417abf-b085-4072-b4ec-f009b5fe4016");

//comments

    res.cookie("act", "tokenAuth.accessToken", {
      httpOnly: true,
      sameSite: "lax",
    });

    res.cookie("ret", "tokenAuth.refreshToken", {
      httpOnly: true,
      sameSite: "lax",
    });

    return "currentUser";
  } catch (error) {}
}

代码在注释之前工作。然后我得到错误

[ERR_HTTP_HEADERS_SENT]：发送到客户端后无法设置头 在ServerResponse.setHeader（_http_outgoing.js:558:11）

将代码分成两部分

1

2

代码的这两部分是分开工作的，但不是一起工作的。原因是什么

    await db
      .ref(
        `/token/${"-MUQK0wGmrjPVBdFH7gr"}/${"90417abf-b085-4072-b4ec-f009b5fe4016"}`
      )
      .set("90417abf-b085-4072-b4ec-f009b5fe4016");

    
    await db
      .ref(
        `/token/${"-MUQK0wGmrjPVBdFH7gr"}/${"90417abf-b085-4072-b4ec-f009b5fe4016"}`
      )
      .set("90417abf-b085-4072-b4ec-f009b5fe4016");

res.cookie("act", "tokenAuth.accessToken", {
          httpOnly: true,
          sameSite: "lax",
        });
    
        res.cookie("ret", "tokenAuth.refreshToken", {
          httpOnly: true,
          sameSite: "lax",
        });