Use Field as Fingerprint Instead of Generating One

since I have a field with a unique value for each of my csv entries, how can I use that field value as a fingerprint instead of generating one, to avoid duplicates?
I experimented with the csv filter for while, and was wondering about the above.

Thank you.

Would using that field as the source value work? (and leave all other parameters out)

source => ["my_field"]

If you have a unique ID in your data you can use this as document ID in Elasticsearch instead of a fingerprint.

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