already-subscribed

This account already has a subscription.

What it means

A checkout would create a second subscription, so it was refused.

What to do

Change or cancel the existing plan in the billing portal: einvoicing billing or POST /v1/billing/portal-sessions.

Example

Sent as application/problem+json (RFC 9457). Branch on type, which is stable. Never branch on title or detail, which are prose and may change.

Exampleapplication/problem+json

{  "type": "https://www.einvoicing.dev/problems/already-subscribed",  "title": "This account already has a subscription.",  "status": 409,  "detail": "…"}

Returned by

Start a subscription POST /v1/billing/checkout-sessions

All problem types

Every error the API can return, with what to do about each.

API reference

Every operation, its parameters and the errors it can answer with.