Finding Contacts, not attached to any incidents

Content

Over the time we have collected thousands of contacts through them contacting us and thus creating incidents.

As part of the data protection we have been seperating these contacts from the incidents.

I want to run a report that checks for any remaining contacts that have not been deleted after this process has been carried out.

The process seems very simple : run a report which highlights all contacts that have no incidents attatched to them.

The issue is that whenever I run these reports I can't find one that shows me one without any incidents.

Please help.

My best regards,