getter attribute on property does not match inheri

Question

I have recently updated to xCode 6.1 and ever since then I'm getting this warning msg for on my project Which was running smoothly without errors and warnings

getter attribute on property does not match inherited from NSOperation

Below is my code

@interface HttpTransceiver : NSOperation {

@private
    ServiceRequest     *m_serviceRequest;
    BOOL                m_executing;
    BOOL                m_finished;
    NSURLConnection     *m_urlConnection;
    NSInteger           m_statusCode;
    NSMutableURLRequest *m_urlRequest;
    NSMutableData       *m_receivedData;
    NSHTTPURLResponse   *m_receivedResponse;
}

@property(nonatomic, retain)    ServiceRequest *serviceRequest;
@property                       BOOL            executing;
@property                       BOOL            finished;

@property BOOL executing; This is the line where I'm getting above warning. I tried to adjust property but it didn't workout. Please Advise

Thanks