import frappe

def execute():
    frappe.reload_doc("lms", "doctype", "lms_course")
    frappe.reload_doc("lms", "doctype", "course_instructor")
    courses = frappe.get_all("LMS Course", fields=["name", "instructor"])
    for course in courses:
        doc = frappe.get_doc({
            "doctype": "Course Instructor",
            "parent": course.name,
            "parentfield": "instructors",
            "parenttype": "LMS Course",
            "instructor": course.instructor
        })
        doc.save()