Refresh IP's in Fortigate

Hi

Newbie Question here

I am new to Fortinet as our company just changed over from Cisco for our 300 stores. One thing i have noticed is that when im logged into FortiGate for a particular store and I've changed an IP for a device, the new IP is not showing up changed in the ports section.  How do i make it "refresh" the IP's without having to reboot the FortiGate and taking a store down.