Transaction not yet indexed

ymmRADq3NNpePWK8HGrjFiZ4XSHqkTCcC4heMz3FuNxqJqWeLyJkB2wPhPQWWwPNBMHKACTmyqzxktKSh18EZCS

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