Transaction not yet indexed

MktxckZ5itHDEnGnpTDPyZV7RJpbC8NT5D3MoWDx73cS8PEKrRXY1bFXaBBAzPhpfnRrBQhaGTU9rWRJQqv6eLv

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