The earliest recollection of this bug is traced back to PAN-OS 10.1.0 - July 29, 2024. ( Firewalls with multiple virtual systems only ) If you configure dynamic DNS (DDNS) on a new interface (associated with vsys1 or another virtual system) and you then create a New Certificate Profile from the drop-down, you must set the location for the Certificate Profile to Shared. If you configure DDNS on an existing interface and then create a new Certificate Profile, we also recommend that you choose the Shared location instead of a specific virtual system. Alternatively, you can select a preexisting certificate profile instead of creating a new one. 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