If you have been told that the VPN Client network can be the same as your local network, this information is incorrect. This is not possible, think of the VPN Client network as another "VLAN", if you configure it to be the same as your local network you will have a conflict between the networks.
I am not a Cisco Meraki employee. My suggestions are based on documentation of Meraki best practices and day-to-day experience.
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