Transaction not yet indexed

1Pb91zRMwTvGVZwFRrtNXCSyce9P2eYapGta6Jv4ihXJtqpkSVHNxq4gN7DR7CdCTTp5UMUrwV7ycdEK3mzvecE

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