This error is received because start term is a read-only field in the course restrictions. It is only seen when importing, not when validating. If you are adding an additional start term, you will be able to import with this field. However, if you map the start term field in the import and the column include a start term that is already selected in the course restriction, you will receive this error. For example, if you start term column in the import reads Fall, and the course restriction already has a start term listed as Fall, this error will be seen when you actually import. However, if the column reads Fall, and Spring is listed as the start term in the course restriction, it will add Fall as a start term and will not generate the error.

To avoid this error, do not map to this column in the Fields tab of the Import.