Transaction not yet indexed

Am1RN2RKmMfYVPG45nHhb57yGDw5ptmZtsjvZsC3jK75t8QBHb5undkfFSBD5xWsKMpmE5v8JU5ZXc8Cvfxuff4

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