Cloud Messaging and 301 Moved Permanently responses to service worker fetches

[Mark]

Hello,

I'm getting permanent requests at five minute intervals for a Chrome push subscription service worker URL that I've long since changed. I've been sending 301 Moved Permanently responses, expecting either a URL update by the service or a ceasing of that subscription, but that hasn't stopped the fetch attempts.

Is there any response I can give to stop or update the fetch of a moved service worker?

Thanks,

Mark