When linking Continuing Course Enrolments Overview to represent student's course work that spans over multiple terms/semester/school years, the Predecessor Course Enrolment is the enrolment that represents the student was enrolled in that section but completed (or intends to complete) the course work in a later section.
A predecessor Course Enrolment will not contain a course mark for the student as the student did not complete the course work within that timeframe.
See the Continuing Course Enrolments Overview for more details.