Transaction not yet indexed

21NMZm51coFpwhMo8Yfm8D7DeySnSrnU9g4hXQQkMAAxRNNHsfSZMT7CDqKCvXimndRCEeNm1LaMR5LY7d5FPVKu

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