What do you have configured under Security & SD-WAN > Configure > Site to site VPN
If set to Mesh (like below) then toggle to Spoke and select your designated Hub.
Mesh (as the name indicates) builds a VPN with all Hubs and Spokes
Darren O'Connor | uccert.co.uk
I'm not an employee of Cisco/Meraki. My posts are based on Meraki best practice and what has worked for me in the field.