Transaction not yet indexed

MkZb7URWa1dTH18B8PSDqGstEdfbVF5H8HB965Wq5vnYWRTJLvNZ6vYGcwikz2wrwYV2L6EjE8PVnopCT7kSyyS

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