ERROR: extra data after last expected column on postgresql

When I import csv file I see the this error

ERROR: extra data after last expected column SQL state: 22P04 Context: COPY everyhighschool, line 1: "B100005528,서울특별시,구암고등학교,구암고등학교,,,,,"

My table

CREATE table everyhighschool(
schoolcode varchar(10),
region varchar(20),
shortschoolname varchar(30),
schoolname varchar(30))

My copy code

COPY everyhighschool(schoolcode, region, shortschoolname, schoolname)FROM 'C:\Users\Administrator\Desktop\code.csv' WITH DELIMITER ',';