How to Fix Forti Manager Fortigate out-of-sync – “the category is already set in another filter”

This post is about fixing the Forti Manager and Fortigate firewall out-of-sync error – “the category is already set in another filter” Troubleshooting * Upgrade the Fortigate firewall version to match up the version with Forti Manager, but it does not help * Check the installation log and the error is as below: Fix After […]

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