Your question is Debugging a Data Report Error. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
Walk me through a time you found a significant error in a data report. How did you identify it and what was the impact?
Focus on one specific example and explain the metric or report involved, the signal that suggested something was wrong, the checks you performed to isolate the issue, and how you communicated the impact. Describe the corrective action and any control you introduced to prevent recurrence.