Transaction not yet indexed

NMB51B8PXMsDUQEMUrdWFE7cuCbKbae4ak7bD5gULva13aaS8jdVWKoruTxjaAMmdBA4Vr6UksbVo54bW5PNKKA

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