Transaction not yet indexed

MUn3xcSCV4vb9cSSYVxPd4UtWwHpcKdrwAeCEJ6sADXsUHvXWy1xpcHKQEY16WiCXjroxY6iAqFcwBg8PPt6aS6

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