1920S - Default IP address vs VLAN 1 Interface IP address

The 1920S have a default IP address of 192.168.1.1 /24 which I can use to access the switch web interface.

Now if go to, Routing > Configuration in the navigation pane and click the VLAN/Interface Configuration tab.

Here I can configure VLAN1 with a different IP address and Subnet Mask....

Could someone explain the difference between the IP address under 'Get Connected > Network Details' and the IP address I am able to assign VLAN1?

Thanks