@JACKSONTAN
I don't use Mastery Paths, but Canvas is really good about hanging on to scores. I would not expect that they would delete any scores when you reconfigure mastery paths as the mastery path uses the assignment to decide upon the path, but the assignment is an assignment even if there is no mastery path tied to it.
I think the real concern with changing Mastery Paths is it not picking up changes as opposed to losing grades. The documentation is full of warnings like
- Mastery Paths should be setup before the course is published.
- If conditional items are added to a path and later changed (such as separating conditional items in the same range or adding another item), the change will not apply to any students who have already been graded based on the original conditional path. Conditional items should be final when course content is published.
That second one implies that once a student completes a conditional item, it counts for them, even if it later turns out that they don't need it.
I might have this wrong as I am just getting this from the documentation (see Modules in the Canvas Instructor Guide) and experience with other parts of Canvas.