Transaction not yet indexed

Nppk8AaGeHJYdsuEYGNWEe6cSH9cBMGEQB6hCTJDRUkT7eLHjdpDWqu6k2vPCrrsFVf9nCTrVp9W3GnJGKpLxNa

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