Transaction not yet indexed

MM6wNVs8FLTEDfkTAdFkt4gwZJCGwjRdnF8FrWfbFRMMF4TNW5dFHpHrXz7HQBvpFWVUZsYyQBqU4ePDN9pSXMs

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