Transaction not yet indexed

MkEP4RNdhEvSAABNeAsML49w1uLNmVxeVSaDQdgyGoAyfdBFJX6o8onLVJxmucFNqtDZgkRfKei6KqqDMSihUbP

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