Troubleshooting Tip: FortiNAC-F 'Duplicated IP address' error after deleting and adding a unit to the topology

[khoffman]

Description	This article describes how to fix the error message 'Duplicated IP address' when a unit is deleted from the topology view and tries to add it again.
Scope	FortiNAC-F (NacOS) v7.x and later.
Solution	When adding a new device inside the FortiNAC Network-Inventory container, the following error may appear if the IP address is re-used: Login to the FortiNAC Admin UI. Navigate to System -> Scheduler.  Select the 'Database BackUp' task and select 'Run Now'. Login to the FortiNAC-F CLI as Admin. Issue the following command to enter the database, from the CLI type:  execute db-shell Check the database to see if a stale entry exists, in the database shell type: select request from ELEMENTS where request='192.168.1.1'; The output may show a lot of information from the database that is not relevant. To fix the issue, it may be necessary to remove the entries from the database.  Delete the state entries from the database, in the database shell type: delete from ELEMENTS where request='192.168.1.1'; Type 'exit' to exit the db-shell. Re-add device to inventory from the Admin UI.