Creator Diary: Should I finish Winter Break now or go back to the beginning to revise it instead?

Three-quarters of the way through one of my current projects, I got so damn confused about which version of the ever-changing story is true in the current iteration that I faced a choice:

Should I keep writing until the end, doing the good work of “finishing first, revising later,” or should I give in and just go back to the start and smooth things out …