Project 3 - job_data

I was trying to enter create table and insert values into the same. but as per the description, jobid is supposed to be unique "jobid: Unique identifier of jobs" but we do have a duplicate entry in the same as per the dataset. Please help! Also, for case study-2 in the guide video uploaded in the folder, it was mentioned we need to create more data and the provided data is just the same. Please could you confirm how many entries should be there?