If changing from a student visa to a Z type, do i still need release papers from previous job?

I was on a Z type in which the company canceled my Z and wrote negative comments in my release papers, which prevented me from getting another job.
I now have a new passport, and I am on a student type. If I was to now get a job, would I still have to submit the release papers? Or could I obtain a Z type without them as I would be changing from X to a Z type?