Transaction not yet indexed

MKkM3dQ1McD8SAtKbjHjHZ7wET4B9Dgz8iL9bcAZS4Z6kLeVYuJxU1hKgdP2ZbUHKj56ia8KHq8JDEXZ6cpFdHT

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