Transaction not yet indexed

21M6Koc3Sddik634D6uphVrBJNEz1zrpKQNXpZPnnWYxWafqfd2aTNwqRGf1MX7Hhhf6Vj3eTHPd4eC2FbK1kFf2

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