Transaction not yet indexed

ymUssbufUjbsmByeav9sUW2g2K9ofQ6stfmQmVxiVceCPq7PgRdBq1W8PAuS4b2jRhxzzaVdDMDsm66JYmCCqTx

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