protected function updatePreferencesForKey(string $key, Collection $tags)
	{
		$tags = str_replace('"', '', $tags->implode(','));

		$tags = Collection::make(explode(',', $tags))
			->merge(explode(',',$this->preferences[$key]))
			->unique()
			->take(self::MAX_TAGS)
			->implode(',');

		$this->preferences[$key] = rtrim($tags, ',');
	}