Set-Cookie is not updated after changing `cookie` config even when `rolling` is set to true

[Desentso]

Environment information

Version: 1.18.2

Platform: All

Node.js version: v22.17.1

Any other relevant information: -

What steps will reproduce the bug?

Config I'm using:

app.use(expressSession({
  secret: '...', 
  name: "sessionId",
  store: new (require('connect-pg-simple')(expressSession))(),
  cookie: {
    httpOnly: true,
    secure: true,
    domain: "example.com",
    sameSite: "none",
    maxAge: 7 * 24 * 60 * 60 * 1000 // 7 days
  },
  proxy: true,
  resave: false, 
  saveUninitialized: false,
  rolling: true,
}));

If I change e.g. sameSite to "strict", or change maxAge, this only applies to brand new sessions. I would expect that with rolling: true, these changes would apply to existing cookies too when the user next time uses the app.