Our website gives sometimes a database error.
The website is part of a multisite.
We had a problem before that a lot of images got duplicated.
This caused a lot of pressure on the database I think.
So I was trying to clean up the database.
I installed the plugin: Advanced DB Cleaner.
See this screencast: https://somup.com/c0VnoBwNwe
Are there things I can savely delete?