Troubleshooting Tip: How to troubleshoot 'Device Serial Number Does Not Match' when performing a device swap in FortiManager

Description

This article describes how to troubleshoot the 'Device Serial Number Does Not Match' error when performing a device swap in FortiManager.

Scope

FortiManager.

Solution

1. This issue can occur when the device selected for the swap is a different FortiGate model from the original device.

2. For example, in a VM environment:

• Original device: FGVM04.

• Replacement device selected: FGVM02.

3. Since FGVM02 and FGVM04 are different models, FortiManager may reject the device swap and display the 'Device Serial Number does not match' error.

4. Ensure that the replacement FortiGate matches the same model and platform type as the original FortiGate being replaced.

5. In this scenario, FGVM04 is the correct model and should be selected as the replacement device.