$this->imageRepo->destroyImage($entity->cover);
$image = $this->imageRepo->saveNew($coverImage, 'cover_book', $entity->id, 512, 512, true);
$entity->cover()->associate($image);
$this->imageRepo->destroyImage($entity->cover);
$image = $this->imageRepo->saveNew($coverImage, 'cover_book', $entity->id, 512, 512, true);
$entity->cover()->associate($image);