Transaction not yet indexed

51akmZDQDkDEfGPRJcVqBKd2meb3CxmZazpx6SxEMoGHxWxwfPyQabxf8hVoWsXK696V8QjHarzzB3ASUM7k2j18

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