Transaction not yet indexed

5191rJpEXHnCYxmLJuABTALsXmYSuCK16nbJYjR4xvTVcAh9RAdTRbZMw97D7f1rQsDwqzdV3cPYSGKbu7smxNm7

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