Best way to delete duplicate GBP accidentally created with different gmail?

[Jessica C]

I have a client who accidentally created a GBP with same business name and website as her main GBP, using a different gmail account. What is best way to delete this duplicate GBP? It has no reviews, no address, no phone number. Both GBP's are Verified according to this tool: https://support.google.com/business/workflow/12825603