To correct, do one of the following:

Turn off the business rule:
1. In Configuration, click Business Rules and highlight Course Request
2. Under the section for Check for the following exceptions when entering requests, unmark the Has Already Taken Course checkbox
3. In Scheduling, click Edit Student Schedule
4. Select the correct term and add the Request for the course

Delete the request:
1. Delete the existing requests for the course
2. Enter the requests for other courses