Transaction not yet indexed

mkkvTzWttFgch821ztRzaSSbPC2et9Frd6qQJ93vv6YdGoJPjuM9dJo1Z7W7VYUE57nkptBqWMBAjV2Aeap4EBf

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