Transaction not yet indexed

Mu3sbknkcpAaXkHQ8xMfqqaoj3TVzyk78SKvHXxDiYFJuxeDdxqRxNej3KKTE1VCFVf3PZMN7baayCUbdnE5Du8

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