How to process duplicate data when importing into the Salesforce Integration App?

Account data was imported by the import function of the Salesforce Integration App.

However, when I linked the account linkage to the field called Account DUID, the Salesforce Account DUID Duplicated data was not imported at all.

I'd like one data to be imported, even if it's account DUID duplicate. (The more fields in the data, the better, but it doesn't matter if it's random.)

Is there a way?