Technical Tip: Fix the duplicate license error by rebuilding the FortiGate

Background:

 The user did the following steps, but still receives duplicate license error alert information:

      • Save all the configuration details of VMs (ASE01: 10.57.3.4, ASE02:10.57.3.5).
      • Delete just the VM resource, but keep the disk, NIC, and other resources.
      • Recreate the VM from the configuration details from before but add the Availability Set.

Solution:

• Adding the licenses to a new instance requires downloading the license file from the support portal and then upload on the instance.
• Have to shut down the old instance completely, otherwise, it will receive a duplicate license error.