[langflow-ai/langflow issue]: the Data API call is pointed at a namespace that was never created in that database. Confirm the keyspace exists in the Astra DB console for that database, and that the app's namespace setting matches it exactly. A frequent cause in integrations is the app defaulting to default_keyspace while the database was created with a different keyspace. Token role does not fix this: an Organization Administrator token still fails when the namespace is missing.

Context: The Data API returns errors with errorCode NAMESPACE_DOES_NOT_EXIST and message Unknown namespace default_keyspace, you must create it first.

## Matched source
Source: Source: https://github.com/langflow-ai/langflow/issues/1770
Original query: "DataStax Astra DB: NAMESPACE_DOES_NOT_EXIST on default_keyspace"
Key terms: astra, datastax, default, does, exist, keyspace, namespace