Removing a duplicate local listing in same city

[AL123al]

Hello,

I see three locations for a client. Two legitimate which I have ownership of, the third is  a duplicate of one of the locations. Ithink it is harming rankings and I want to get rid of it. It is  service area business. Things keep changing, but how will I remove it? My client obviously set this up a while ago and it is left with wrong or missing info. When I click on the business under "more listings" on maps there is a chance to "edit it" AND "claim it" but not delete it. When I strart to claim it I go through adding in everything but then I worry I am legitimising the duplicate. How do you get rid of it?

Thanks

[Innovation-Group_SEO]

Hello,

First of all claim (with the same google "owner" account) the location.

Then sign in to Google My Business.

Click Duplicate locations at the top of the page, then click the location you'd like to remove.
Review the location. Make sure the business information for the duplicate location is included in the location that will remain in your account. Make sure that the photo URLs, ad-specific fields, and store codes are up-to-date in the location that you are keeping.

Click the back arrow in the top-left corner to return to your location list.

Click Remove duplicate on the right side of the location you'd like to remove.

Find more: https://support.google.com/business/topic/4669096?hl=en&ref_topic=6377390