Troubleshooting Tip: How to resolve FortiCare Registration Error when logging in to GUI

When attempting to register with FortiCare, the error 'FortiCare: This product serial number has already been registered' can be encountered, as displayed in the screenshot.



The following steps can be taken to address this issue:

1. Continue to the GUI by selecting "Later" in the screenshot above.
2.  Navigate to the CLI and execute the following commands: 

execute update-now 

In case the update is still pending, run the below command to check the issue.

diag debug application update -1
diag debug enable

And to disable the debug below is the command:

diag debug disable

3. Verify the update was successful by navigating to Log & Report -> System Events.

Verify that the registration was successful by navigating to System -> FortiGuard