What is the benefit of NetSuite Force Unique Customer Entity (If duplicate)?

What is the benefit of NetSuite Force Unique Customer Entity (If duplicate)?

In some cases, NetSuite keeps customer entity id as customer name or company name, but whenever any customer details contain the same company name or same customer name then the NetSuite does not create a customer with duplicate entity id. In that case, we add some prefix or suffix value in customer entity id just to avoid duplicate entity and creates a customer on NetSuite successfully.

By Default, it is selected as "NO".  You can select the drop down either BY PREFIX or BY SUFFIX as per your requirement.