Transaction not yet indexed

AmMpbVP7ubybpfeTQYvkcoBYemD93rvXTAYkfUgh2vaW4PNb8TTVJGiPcQg4zY7fpT3PyaGR8yEkbsdbHHvJFr6

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