Remove one exact duplicate

Methodology and expected outcome

Load this synthetic test, then choose “Run checks.” Its declared rules are shown below and loaded into editable controls. Changing them changes the question being tested. Expected: Deduplicate by key — passed. Other rules can pass or remain not checked. Review the full outcome list and exact differences.

{
  "key": "id",
  "preserveIds": true,
  "protected": [
    "name"
  ],
  "deduplicate": true,
  "rowDelta": -1,
  "totals": [],
  "dates": []
}

Products are not yet tested. This case was deliberately constructed to exercise checker behavior; it is not a model comparison, certification or claim of human review. Passing selected constraints does not establish factual or business correctness.

Downloads preserve the fixture values exactly. Formula-like values may execute in spreadsheet programs; inspect untrusted CSV as text or import columns as Text.

id,name
001,Ada
001,Ada
002,Bo

id,name
001,Ada
002,Bo