I imported Requesters from AD, but then I found mistakes and correct them in AD. (I want to import this data later, after clearing all departments and sites) I deleted all requesters, departments and sites, but some of departments and sites left. Error is  Department is being used by a module. Hence cannot delete it.

I don't know which module uses some of departments and sites. There are no more requesters and no technicians except me.

Can you tell me how can I delete all of sites and departments?

Thank you.

Mari