multi subdomain laravel with different source code different version

[HoAnhTungPrimelabo]

source1: laravel version 6.7.0 url: shop1.example.com

# file shop1/.env
...
APP_KEY=base64:jQ6s4CIxqwRVYuqKITThUJaaPaeG86AbE9E/bxBpNiI=
SESSION_DRIVER=redis
SESSION_DOMAIN=.example.com 
SESSION_LIFETIME=120
REDIS_HOST=127.0.0.1
REDIS_PASSWORD=null
REDIS_PORT=6379
REDIS_CLIENT=predis
REDIS_PREFIX=shop
...

source2: laravel version 7.26.0 shop2.example.com

# file shop2/.env
...
APP_KEY=base64:jQ6s4CIxqwRVYuqKITThUJaaPaeG86AbE9E/bxBpNiI=
SESSION_DRIVER=redis
SESSION_DOMAIN=.example.com 
SESSION_LIFETIME=120
REDIS_HOST=127.0.0.1
REDIS_PASSWORD=null
REDIS_PORT=6379
REDIS_CLIENT=predis
REDIS_PREFIX=shop
...

source1 and source2 on same server, same SESSION_DRIVER=redis, same APP_KEY, same table users

i want when user login shop1 goto shop2 still login both sites
but cant: when login shop1 goto shop2 -> logout both sites
i found out something wrong with EncryptCookies
soure1 laravel version 6.7

// file shop1/vendor/laravel/framework/src/Illuminate/Cookie/Middleware/EncryptCookies.php
    protected function encrypt(Response $response)
    {
        foreach ($response->headers->getCookies() as $cookie) {
            if ($this->isDisabled($cookie->getName())) {
                continue;
            }

            $response->headers->setCookie($this->duplicate(
                $cookie, $this->encrypter->encrypt($cookie->getValue(), static::serialized($cookie->getName()))
            ));
        }

        return $response;
    }

soure2 laravel version 7.26.0

// file shop2/vendor/laravel/framework/src/Illuminate/Cookie/Middleware/EncryptCookies.php
    protected function encrypt(Response $response)
    {
        foreach ($response->headers->getCookies() as $cookie) {
            if ($this->isDisabled($cookie->getName())) {
                continue;
            }

            $response->headers->setCookie($this->duplicate(
                $cookie,
                $this->encrypter->encrypt(
                    CookieValuePrefix::create($cookie->getName(), $this->encrypter->getKey()).$cookie->getValue(),
                    static::serialized($cookie->getName())
                )
            ));
        }

        return $response;
    }

how can i keep login both sites with different laravel_version 6 vs 7? (middleware? external package? custom class?)