@RafaelSilverman It sounds like you have crosslisted a section from one course into another course. In Canvas, a section is essentially a list of enrollments, and it can be moved from one course to another. You may be able to de-crosslist the section back to its original course. The old assignment submissions & scores are contained in the original course, and de-crosslisting the section will reveal them there. Of course, if the students have submissions & scores in the course into which their section was crosslisted, then de-crosslisting the section will effectively hide these newer submissions and scores. If your goal is to keep the students in their new crosslisted course, you could de-crosslist the section, then export the gradebook from the original course, then recrosslist the section, then enter the grades in the crosslisted course.