Transaction not yet indexed

1SpT99bkScadFtUBAcYpC8haTgM5ejTfWuWeSbbQmHUY5YFpiQNazW1e9DZA9jxsqjm3iFTLUZNF6o8BmDj1Wft

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