Transaction not yet indexed

AMnmeiExPEvopkC8vNxLPd5258HJ3EHRghQ6dBSreq2qPhQ5B6P4eAJcmGgQthuJANU7TkjZsMQGzS4BqE6aHKN

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