As far as I know when you do a factory reset it will be resetted to its factory SW version. After connecting back to the Dashboard it will update itself. https://documentation.meraki.com/General_Administration/Support/Resetting_Cisco_Meraki_Devices_to_Factory_Defaults#:~:text=Cisco%20Meraki%20devices%20can%20be,out%2C%20which%20ever%20occurs%20first. Resetting a Meraki appliance to factory defaults will clear the local configuration stored on that appliance. This will clear any statically assigned IP address information, Ethernet configuration, DHCP lease pool, and web proxy settings. If a device is still in a network after being factory reset, it will redownload its previous configuration when it comes back online. This includes any previously assigned static ip addresses. If the configuration needs to be completely reset, make sure to remove the device from its network before resetting to factory defaults.
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