> For the complete documentation index, see [llms.txt](https://doc.duaer.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://doc.duaer.com/build/remove-duplicates.md).

# Remove duplicate items in Duaer

In Duaer, Remove Duplicates drops items that repeat in the current input. It can also drop values already seen in earlier executions.
## Drop repeats in this batch

1. Search for Remove Duplicates and connect it after the previous node.
2. Leave Operation on Remove Items Repeated Within Current Input.
3. Set Compare to All Fields, or to Selected Fields and fill Fields To Compare.
4. Select Execute step. Each compared value appears once in the output.

Remove Items Processed in Previous Executions drops values already seen in earlier runs. Clear Deduplication History wipes that store.
## Questions

### Does Remove Duplicates in Duaer compare every field by default?

Yes. Compare defaults to All Fields. To dedupe on email only, choose Selected Fields and fill Fields To Compare.