Security check showing deleted tables (things)

Hey all,
I am using the security tab to check for security issues. Strangely, it outputs a bunch of security issues, including for data tables (things) that no longer exist. I did clean up the app, using the Optimize application in the Settings-General tab.
But for some reason, I do not understand, the tables I deleted are still showing up?

How can I resolve this?

The Data type does not exist anymore…