Ocsng Registry Location

When we uninstall an inventoried client from the Ocsng website and then the software from the computer the old settings return like the tag and other fields. How do we remove everything related to that inventoried client? I would assume that it is written in the registry somewhere? We are setting up the agent as a service.

Cheers

Debian 8.5 Server version 2.3.1

Windows Agent 2.3.0.0