You can delete address spaces that have been added. You cannot delete the Default address space.
When deleting an address space, you must take into account the established links between this address space and the addresses that are indicated in application objects, including devices, risks, rules, events, and other objects. If deleting an address space results in the deletion of links between this address space and addresses, the application automatically deletes these addresses. This could lead to the deletion of application objects (such as devices) if these objects have no other remaining addresses.
Users with the Administrator, Security Officer, or Infrastructure Officer role can delete address spaces.
To delete an address space:
On the Address spaces tab, click the 
 icon in the block containing information about the address space that you want to delete.
A window with a confirmation prompt opens.