Mine was that I had forgotten to take a class or that the records were lost and I had to redo the last years of college. It was a nightmare I had even a decade after getting my degree.
Same here -- my classmates and I go back to high school for taking one history class, as due to administrative difficulties one requirement for the degree was not met, and noone noticed until now. I went there more than 20 years ago.
Ughhh, I had a dream within the last couple months where I had to go back to high school for a very similar reason, to finish one last class or something. I couldn't tell you why, as things in dreams often don't make sense, other than that I had to. And it was very strange having to be in those hallways with all the school kids as an adult.
