Cannot delete department or wipe out Additional Fields

Cannot delete department or wipe out Additional Fields

Hi,

I am using ServiceDesk Plus version 9.3 Build 9301.

I created three departmets which I now see from Default Settings. I cannot delete them and error message shows: "Department is being used by module. Hence cannot delete it."
How can I get those deleted? 

Earlier I added some Additional fields on Purchase - Additional Fields or to the Contract - Additional Fields. I am not sure which one because i already deleted them. Both Additional Fields are empty. Still there are possible to assign these additional fields to the assets. And these Additional Fields show on Columns.

I noticed that when I change language to english those fields won't show up. 

Problem is that my motherlanguage there are now two things with the same name "Sijainti" as in english "Site".

How can I delete these additional fields?

                New to ADManager Plus?

                  New to ADSelfService Plus?