Transaction not yet indexed

1CU5uE5STpYqKN7seiKJ3LXB4vXxrn1RGD7MymWrCvtQnad2pd1UqEWovwWWtpg88GWCoJSgA9vyCU3bmgaLmo7

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