The following warning is shown in SmartDashboard when changing tabs in Security gateway object properties or when opening the properties:

Changing the hardware to <New_Selected_Check_Point_Appliance> Appliances is blocked.
Reason:
Changing the hardware will disable Identity Awareness and it's components.
Sharing identities is used by other gateways:

Gateways that receive identities from this Gateway:
- <Name_of_Gateway_Object_1>
- <Name_of_Gateway_Object_2>

Resolution:
Remove the dependencies on the identity sharing and than repeat the action.

Example:

Warning appears in the following scenario:

1. Create an object of Security Gateway "A" with the following settings:
   
   • Hardware platform - select some Check Point Appliance (e.g., 13000)
   • Enable Identity Awareness blade
2. Create an object of Security Gateway "B" with the following settings:
   
   • Hardware platform - select some Check Point Appliance
   • Enable Identity Awareness blade
   • Expand "Identity Awareness" - click on "Identity Sharing" - add Security Gateway "A" object
3. Open Security Gateway "A" object - try to change the Hardware platform to another Check Point Appliance - the above warning appears