Hello Jaeyoonkim,
Thanks for posting your questions here in the Meraki Community Forum as well.
That catalyst configuration you're referring to will be added by Catalyst onboarding tool. You don't need to add manually to your netconf.
Check out this (non-official) article about onboarding Catalysts.
- Catalyst on Meraki: Getting Started
I also replied to your support case and we can discuss your questions over there if you prefer.
Hope this helps other people in this community as well.
Cheers!
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