Transaction not yet indexed

MamE7DFJvgXMpc9mhQq6pZ7hNpZbUP2rzrdaTwqFVbnxrCERQVNAcnSbNTpJSaWe4N7cua33Vq2nJ3P6SubxADE

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