Applies to some extensions

When I delete the description and apply or save the description reappears. Why?

By default, the extension installs some demo descriptions, images, links, to help you understand how you should use the extension, what and where to insert.

From now on the demo data removal is automated. Once installed, switch the setting Delete Demo data? to Yes and publish.

Note : That setting will disappear from the menu configuration because there is no demo data.