Problems with modifying the Jupyter workbook

When sending the laboratory to be graded it gives me this error: Comment line with index: UNQ_C1 is duplicated
The most likely thing is that I modified something in the book that I shouldn’t have done, because my answers are correct. I request that you provide me with the original book so that I can move forward with the shipment of the laboratory, thank you.

You have filed this under a general category, so we can’t tell which course you are taking. But there is a generic way that should work for notebook from most of the courses to get a fresh copy. Please see this thread, which describes the process for the DLS specialization. Please give it a try and let us know.