Transaction not yet indexed

unJ688JvzTpPKGh34BLtLQZw5iZpvL8Saf8ULYk6QSy6T91D5yGLYkdgCEjLfMXkwk4UPbs8fEJjWPNsQC559e2

The transaction signature is valid but not yet indexed by this RPC node, or the transaction failed before inclusion.