How to add another entity type to Search API multiple types index? I created a multiple types index using Search API. Now I would like to add another entity type to it, but it's not possible. Is there any solution? I really would like to avoid recreating the index.
Not a proper answer, more like a workaround:


Load index. 
Delete it. 
Mark it as new. 
Change the datasource settings. 
Save it again.


Source: https://www.drupal.org/node/2632880#comment-11208443