Transaction not yet indexed

NM419Fx51g7ed4Qpaf3gfGGXQwSHRt12MUDPoJJkZusDRvG9V2u3GF8J2H1FhHiHEfu1m2VTvmoAHi6MXMaGdem

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