Several months ago, we imported a list of companies into Hubspot, and now I am trying to update these companies with new properties (EINs, industry, etc.). Unfortunately, our original list (and the updated list we added EINs and industries to) did not contain Record IDs or company domains; since those are the only two options for deduplicating companies during an import, I am unable to upload this new list without creating all new companies. I tried creating a unique property that does not allow duplicates, but this is not an option for import keys. Basically--it should be an option to use a custom property that does not allow duplicates as the required property for managing duplicates during an import, instead of just Record ID/company domain.
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