When running the MoveClient RestApi command in Symantec Endpoint Protwection 14 to move clients to their respective client groups it fails on user-mode clients.
Duplicate hardware key found
The MoveClient RestApi doesn't consider clients in user-mode. The issue is caused by multiple user-mode clients shared the same hardware key and the RestApi doesn't accept that situation.
This issue is fixed in Symantec Endpoint Protection 14.2 RU2. For information on how to obtain the latest build of Symantec Endpoint Protection, read
TECH 103088: Download the latest version of Symantec Endpoint Protection