# E03015 — SubscriptionNotActive

The subscription is not active.

- **HTTP status**: `409`
- **Type**: `conflict_error`
- **Name**: `SubscriptionNotActive`

## What to do

The subscription is cancelled or has not started, so it cannot be changed. Re-read it to see where it stands.

## Related

- [Idempotency](/docs/api/idempotency): safe retries and key reuse rules
- [E03xxx — Billing & plans](/docs/api/errors/E03xxx): every code in this range
- [Errors](/docs/api/errors): the full wire contract, status mapping, and error catalog
- [Error handling](/docs/guides/errors): branching on `type` and `code`, validation details, and `vendor_code`