After a clean set up of SD Plus I found some objects, visible only in the "view all CI" СMDB.

They are:

Technichians:

John Roberts

Heather Graham

Jeniffer Doe

Shawn Adams
Howard Stern

Windows Workstation: 

ijaz-0427.csez.zohocorpin.com.      

I can edit them but they still do not appear in tech list or in workstation list. And there is no way to delete them via GUI.

How can I remove them from the system totally?