Cannot upgrade flaresolverr

Hi all, After trying to update flaresolverr to pr-1282, the version is still 3.3.21.
There's no error during the update, did I miss something?

Outputs:

#Upgrade
ethost@comet:~$ app-flaresolverr upgrade --version 'pr-1282'
{"data": {"port": 15961, "version": "pr-1282", "api_url": "http://172.17.0.1:15961"}, "result": true}

#After upgrade
ethost@comet:~$ app-flaresolverr --version
app-flaresolverr 2024.05.02
ethost@comet:~$ curl http://172.17.0.1:15961
{"msg": "FlareSolverr is ready!", "version": "3.3.21", "userAgent": "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36"}