Resolve duplicate business profiles

While it's true that duplicate content can negatively impact SEO, Google doesn't actively penalize websites for having it. Instead, Google's algorithms prioritize unique, high-quality content and may downrank duplicate pages or select a canonical version for search results.

Can I merge 2 Google business profile?

Yes, you can merge two Google Business Profile listings if they represent the same business at the same location. However, you can't merge listings that represent different locations or businesses. To merge, you need to verify ownership of both profiles and then contact Google My Business support to request a merge. 
Here's a more detailed explanation:

Eligibility:  
Both listings must represent the same physical business and location. If they don't, you can't merge them.

Ownership:  
You need to be verified as the owner of both listings or have access to them. 
 

Contact Support:  
Once you've verified or gained access, you'll need to contact Google My Business support through their contact form to request the merge. 

Verification:  
Google may ask you to verify ownership of both listings again as part of the merge process. 
What happens after a merge:
The reviews from both profiles are combined into the merged profile, but replies to reviews may be lost, according to Google Help.

Important Considerations:

   If you've accidentally created duplicate listings, you can't just log into one and edit it to reflect the other. You need to contact support.

Google will likely ask you to choose which listing you want to keep as the primary and which to merge into it. 
Be prepared for a verification process, as Google may ask you to re-verify the ownership of both profiles to ensure they represent the same business.