psychonet on "[Plugin: WP-Sweep] Transient data is not deleted"

After update for PHP7 the transient data from the Option Sweep is not deleted. I already try uninstall/install WP-Sweep. This problem occur in all of my websites running on PHP7 at SiteGround (e.g., http://portal-sites.net).

How can I fix it?
Thanks.

https://wordpress.org/plugins/wp-sweep/

It might be when you run the sweep, it got deleted, but the transient data got created again at the next page load.

However when I use WP Optimize the transient data is deleted and the WP Sweep show no data to clean. But if I run WP Sweep first the data is not deleted.