How set custom properties when upload multiples photos

[gobackdev]

Hi guys. I upload some photos to the system and try to set custom properties in a loop. But the check does not work and properties are assigned to all elements.

public function upload(MediaEntity $entity, PhotosDto $dto)
{
    foreach ($dto->getPhotos() as $photo) {
        $name = Str::slug($entity->getName(), '_').'_'.time();
        $media = $entity->addMedia($photo)->setFileName($name.'.'.$photo->getClientOriginalExtension())
            ->usingName($name);

        if ($this->emptyMediaCollection($entity)) {
            $media->withCustomProperties(['main' => true]);
        }

        $media->toMediaLibrary($entity->getMediaName());
    }
}

protected function emptyMediaCollection(MediaEntity $mediaEntity): bool
{
    return !$mediaEntity->hasMedia($mediaEntity->getMediaName());
}

Result

Thank you in advance