Transaction not yet indexed

5UF91wMDMiVYhJSaJpCPnvmTPucUNj7u7xSqhQrt2WQzHWf1dEHjsGabAuNPdsDddrkgtaiVULBUCAnmM7HV6YH2

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