Help me in solving GSQ62 problem

help
,
1

My issue

i don’t understand what is problem here

My code

SELECT 
    s.St_id,
    s.St_Name,
    s.Department,
    c.Course_id,
    c.Course_Name,
    c.Credits,
    c.Prof_id
FROM 
    student s
INNER JOIN 
    course c
ON 
    s.Course_id = c.Course_id;

Learning course: Database management systems
Problem Link: Inner Joins in Database management systems