Transaction not yet indexed

MkkuFG8R8EqBhZ5xVyZkU3P6DaDtbUMHeZEzv8q3HoPnefdLTScSr7sXcpeFST68hpeMt2kXaBy1QnDwcLrvyQ2

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