MKAnnotationView images has replaced after zoom or reopen tap - ios

Question

I am parse Json with coordinates and download individual profile image for each annotation view. When I do zoom or move on map I see what images replaced on wrong places. For example I have annotation view with coordinates 111.1111, 111.1111. First time image and coordinate is correct, but after moves/zoom/reopen tab with map I see other annotation view with coordinates 222.222, 222.222 with image which is suitable for 111.111, 111.1111.
(MKAnnotationView *) mapView:(MKMapView *)mapView viewForAnnotation:(id<MKAnnotation>)annotation
{
static NSString *identifier = #"SYLocationItem";
if ([annotation isKindOfClass:[SYLocationItem class]]) {
MKAnnotationView *annotationView = (MKAnnotationView *) [_mapView dequeueReusableAnnotationViewWithIdentifier:identifier];
if (annotationView == nil) {
annotationView = [[MKAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:identifier];
annotationView.enabled = YES;
annotationView.canShowCallout = NO;
SYJabberClient *client = [SYJabberClient sharedClient];
[client retrieveProfileForUserWithEmail:[(SYLocationItem*)annotation email]
withSuccessBlock:^(NSDictionary *dict, NSError *error) {
if (dict) {
UIImage *image = [dict objectForKey:#"imageFile"];
UIImage *displayImage = [UIImage circularScaleNCrop:image
withRect:
CGRectMake(0.0f,0.0f,30.0f,30.0f)];
annotationView.image = displayImage;
}
}];
} else {
annotationView.annotation = annotation;
}
return annotationView;
}
return nil;
}
In this code now I get image from local, but if downloading images I have same issue.