selecting multiple images and storing them to coredata - ios

Question

Iam using PHPickerViewController to load multiple images and store them to CoreData.
Along with the imagepicker, there are three more parameters, which are successfully passed from a previous tableview on tapping its cell.
In coredata i have created an additional parameter galleryImage, of type NSObject to pass this images as array
//button tap to select picker
#IBAction func gallerySelectClicked(_ sender: Any) {
presentPickerView()
}
//configure
func presentPickerView() {
var config : PHPickerConfiguration = PHPickerConfiguration()
config.selectionLimit = 10
config.filter = PHPickerFilter.images
let pickerViewController = PHPickerViewController(configuration: config)
pickerViewController.delegate = self
self.present(pickerViewController, animated: true, completion: nil)
}
//Saving
func picker(_ picker: PHPickerViewController, didFinishPicking results: [PHPickerResult]) {
picker.dismiss(animated: true, completion: nil)
for item in results {
item.itemProvider.loadObject(ofClass: UIImage.self, completionHandler: { (image, err) in
if let image = image as? UIImage {
print(image)
DispatchQueue.main.async {
self.Gallery.image = image
let dh = DatabaseHandler()
//Databasehandler in another file
dh.imgArray.append(image)
dh.saveImage()
}
}
})
}
}
Saveimage function in Databasehandler
func saveImage() {
let appDe = (UIApplication.shared.delegate) as! AppDelegate
let context = appDe.persistentContainer.viewContext
let photo = NSEntityDescription.insertNewObject(forEntityName: "People", into: context) as! People
var CDataArray = NSMutableArray();
for img in imgArray{
let data : NSData = NSData(data: img.jpegData(compressionQuality: 1)!)
CDataArray.add(data);
}
photo.galleryImage = NSKeyedArchiver.archivedData(withRootObject: CDataArray) as NSObject;
do{
try context.save()
print("data saved" )
} catch{
print("error")
}
}
Problem is when I select 2 images and print count to check wheather it is saved, output will be 2. when I select another 2 images in a second run, output is 4 . In this way, count keeos increasing
Could you please help me to find whats wrong with this code? I couldnt find any other good reference for PHPickerController .