Transaction not yet indexed

MUm2qbPjUaZmEXeFZEqyGz5ykEQHpHYkLEEKcQSUuhugoAVyLqsM2TH3DzoReZkfxBkqXvY2TXVPn6UfcAdXxqc

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