Core issue
This happens while you create a network group to be used in firewall access control lists (ACLs).
Note: These duplicate object groups appear in the global objects section under multiple firewall interfaces.
Resolution
This is an expected behavior that the firewall services module shows.
Complete the following steps in order to manually remove the duplicate object groups.
- Remove the object.
- Re-add the object.
- Refresh the Adaptive Security Device Manager (ASDM).
Refer to the Network Object Groups section of Global Objects for information on configuring Network Object Groups.