APNS Service returning GOAWAY errorCode 2

We are migrating to the APNS service which is HTTP2 and TLS based APNS API. We are receiving GOAWAY errorCode 2 responses.

Sent GOAWAY: lastStreamId '0', errorCode '2', debugData ''. Forcing shutdown of the connection.

We use the old App certificates still which used to work with the old certificate based APNS connection mechanism.

We are too late in migrating to the new ways and we read https://developer.apple.com/news/?id=uzyxiriy#:~:text=APNs%20will%20no%20longer%20support,protocol%20after%20March%2031%2C%202021.

Any help is highly appreciated as we will have a big outage when we are not able to migrate to the new HTTP2 based implementation.

Also can you share if the old mechanism will be stopped completely or will the support be stopped.
Even We are also facing same issue, did you find any solution?
Details about the push requests you sent would be helpful to find out what this might be.
APNS Service returning GOAWAY errorCode 2
 
 
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