Your question is Mistake and Lessons Learned. 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).
Tell me about a mistake you made at work. Explain the context, your role, how you discovered or addressed it, and what you learned. Focus on your ownership, the steps you took to limit the impact, and the change you made to prevent a similar mistake.