At Emdi we can fix a database when it has multiple duplicate entries in documents, customers and items.

In the clientele there are 2 ways, one is when we have a small number of duplicate entries and the other when we have a large number of duplicate entries.

select with  Control + click the registrations that are the same, right click and I choose customer / supplier integration.

Priority is always given to the customer we chose first, ie you create a record with the data of the first customer and merges all the documents to him.