### `{{CODE}}`

- **Trigger:** {{conditions that raise this error}}
- **User message:** {{exact user-facing copy or i18n key}}
- **Operator meaning:** {{what happened internally}}
- **Recovery:** {{what the user / operator should do}}
- **Retry safety:** {{safe to retry | not idempotent | manual intervention}}
- **Ownership / alerting:** {{owner team + alerting hook, or "none"}}