Troubleshooting Tip: 'Invalid license Duplicated'

[gcortes1]

Description	This article describes the 'Invalid license Duplicated' error that occurs when a license (.lic) file that has been previously used is being re-used on a different VM instance and offers a solution.
Scope	FortiMail.
Solution	To resolve this condition, the VM instance where the license was previously used needs to be shut down completely for at least 90 minutes. Reinstall the license after that. After 90 minutes, the VM license deregisters from FortiGuard servers, and it will be possible to use it again on a new VM. Note 1:  This is an automatic process. It is not possible to speed it up. Note 2:  If the problem persists, open a ticket with the TAC, providing the following information: get sys status diagnose autoupdate status diagnose autoupdate versions diagnose debug enable diagnose debug application updated 7 execute update now To disable debug mode, execute the following command: diagnose debug disable Output from CLI: fmail # diagnose system vm System Time: 2025-09-05 15:42:44 CEST (Uptime: 0d 0h 56m) UUID: xxxxxxxxxxxxxxxxxxxxxxx File: Subscription License Resources: 2 CPU/1 allowed, 3.9 GB RAM/1024.0 GB allowed, 249 GB Disk/1024 GB allowed Registered: 0 (False) Status: 3 (Invalid: License has been detected as invalid, please upload a new license) The VM license is connected to the VM UUID. The main reason for the license duplication can be that the UUID of the VM has changed. Make sure that the VM with the old UUID is shut down and not connected to the internet. Upgrade to one of those versions is recommended: v7.2.6, v7.4.3, v7.6.0.