Why is web server configuration fully regenerated during updating Plesk to 18.0.82 Update 2 and 18.0.81 Update 7?

Question

Why is web server configuration fully regenerated (for all domains on the server) during updating Plesk to 18.0.82 Update 2 and 18.0.81 Update 7?

Answer

Plesk updates 18.0.82 Update 2 and 18.0.81 Update 7 address a critical security issue.

Because of it, the web server virtual host templates are changed, and the web server configuration files of all domains are regenerated during the update.

That change and the configuration regeneration should not affect the operation of majority of websites.

If custom virtual host templates are used on the server, review them after the update.