我越来越：

ORA-00918：列的含义不明确的00918。00000-“列的含义不明确的”

每当我尝试运行时：

select 
first_name as student_first_name, 
last_name as student_last_name

from super_student ss

inner join sub_distance_learning sdl
on sdl.student_id = ss.id

inner join sub_academic_tutor sat
on sat.id = sdl.academic_tutor_id

inner join super_sub_lecturer ssl
on ssl.id = sat.lecturer_id

inner join super_employee se
on se.id = ssl.employee_id;

该错误仅在包括以下内容时显示：

inner join super_employee se
on se.id = ssl.employee_id;

有任何想法吗？