How to set a source_type for CSV with headers?

Getting Data In

Hi,

I'm trying to set a source_type for CSV files that contains headers, and the fields are extracted fine.
The problem is that the data is extracted both as fields with the headers and as indexed fields like: field1, field2, etc.

My question is:
Is it possible to extract only the fields with the headers and not the fields field1, field2?

Thanks!

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