Created on 12-05-2016 02:03 PM Edited on 12-17-2021 03:30 AM By Anonymous
Description
When trying to add a device to FortiManager, the following error is displayed "A device with Serial Number already exists"
Scope
Fortimanager
Solution
There is another device (either registered or unregistered) with same serial number in the FortiManager's device list.
Note: An unregistered entry will occur if the FortiGate has already attempted to connect to FortiManager.
# diagnose dvm device list
Identify registry with serial number and delete it
# diagnose dvm device delete "adom" "device name"
After deleting the existing device, you be able to add the new device to FortiManager.
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