Overview with condition "textfield property empty" possible?

Infos:

  • Used Zammad version: 5.2.x
  • Used Zammad installation type: package
  • Operating system: CentOS 7
  • Browser + version: Firefox ESR

I have an added field on the ticket object, named “System” of type textfield / text.
Now I want to create an overview where one condition is that “System” is not empty.

In the overview conditions, I tried “System does not contain” and left the value empty, but that does not work, as the value is mandatory and I cannot save the overview.

Is there a way to denote an empty textfield in the condition? Or maybe a workaround to get the same result?