PratikArora you should never update push notification with new keys.
How would FCM now send notification to your subscribers? They cannot as the key changed.
(If the keys are changed FCM Cannot recognise the registered push tokens hence no notification can be delivered)
You need to delete everything on the push_tokens table if you ever change keys of your FCM.
(You need to do that now) (this will reset your subscribers)
And the when your your customers visit the homepage of your webview, they will be convered to subscribers.
