Open enrollments may not be submitted if student already graduated with a Regular HS Diploma

Understanding the Error: The system is trying to ensure that if an open enrollment record (Enrollment Exit Date = blank) is submitted for a student, that the student doesn't have a prior enrollment graduate record (Student School Completion Status Code = 100).

Things to check in the submission:
Verify the student doesn't already have prior enrollment graduate record in the system.

Suggested Resolution:
1) Correct Student School Completion Status if the value is incorrect and re-submit. May need to update the Local SIS.
OR
2) Correct Enrollment Start Date if the data is incorrect and re-submit. May need to update the Local SIS.
OR
3) Remove submitted open enrollment record from file.