How to Enrich Company Data Without Duplicating Entries

Hi everyone! A question. I need to enrich the companies in a column, but there are duplicates in this column (I can’t delete them because under one company there are several contacts). How can I set up the action or which formula should I use so that enrichment is done only once per company and not repeated for duplicates? When gave de-duplication instructions -those didn't help (clay burnt credits anyway) TY!