Transaction not yet indexed

Nz21EtQfKDFLEPSqvGyKGfnCwtE5SyFkpM71Zbq7XeS3EzeJmBA3msvm3TfQSH7SM1LpNR2TVEFz98f13ieiaer

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