Transaction not yet indexed

ES51Ssu6CiASwRC5XeGiUZnzYVB1Z8JUkEAu7mshEUWDEfoV4aWuF7HzCXdeA8Jo4bKibAkmKhG9J1bTaXM4JT6

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