Unable to delete Off Page Reference Models icons come in the Oneclick console

While trying to delete Off-Page Reference Icon, the below error is observed:

The off-page reference icon is a special purpose topology icon. The off-page reference icon represents a device that is directly connected to a device in the current view but which is modeled in another layer. The following icon shows an example of an off-page reference icon:

The above icon cannot be deleted

You could make the "Off Page Reference Models" not visible as below: 

From the OneClick Console, click on > View > Preferences > Topology Tab > Show Off Page References > Set "Specifies whether or not Off Page Reference Models are visible" to No > If you want the changes to be Permanent, ensure "Make Changes Permanent" is check marked (default) > Click on Apply > Click on Ok 

For further information, please refer the below links:

https://docops.ca.com/ca-spectrum/10-2/en/managing-network/modeling-and-managing-your-it-infrastructure/icons-in-topology-views#IconsinTopologyViews-Off-PageReferenceIcon

https://docops.ca.com/ca-spectrum/10-2/en/managing-client-applications/using-oneclick/using-and-customizing-oneclick/set-oneclick-preferences/topology-tab-preferences