Transaction not yet indexed

UMm6a7mZ2dbMJGLknKgGex5P5W18YrueWNGdhMHpT3b6kkwMCj2zpezEvWFqdUpHKC6JU6r1KJ2JFPYhGdwChPE

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