Transaction not yet indexed

ex51c5CRegUMqJJVDFeMNc89UpsgFbpeS777zv4vh3wwvkXULznRmn8Pb2u3dAP9A4TyHm5KjuM2d77hW1U54vC

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