Transaction not yet indexed

mMk2zikUEDDJZd97pChWsw4qThBMQrLVaJDUhuiFDoWpDdmHugLGe4ZUnGhExoM1u9oRYuCxjsx7GxZTBNdwZ21

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