Transaction not yet indexed

MdkS5wdpk8D5y4nbNXMQkeKfdYui5kKNxFNQRAcXkd8RZSTwFqsensV7Q4o8Jp9pYdjZtNoXgrXfbFdaDpmA2JA

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