Transaction not yet indexed

Am1EXpQQvyGrDZ5GGq4QCiUJKxuxiYCn4udei5JKzCDj6bK7o6U6sKXKHp39GFaHma7CzbKPTDU2G2HzZ2n7khF

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