subscription_canceled

The subscription is canceled, so it can't be upgraded.

HTTP 409.

Likely cause: The subscription was canceled and ends at the end of its period.

What to do: Resume the subscription, then upgrade.

Retry: No. The same request gets the same answer; change something first.

Listed under Billing, slots and dedicated IPs in Errors. Send the error’s requestId to support and we can find the request.