insert into nss_item(it_id,it_name,it_amount,it_stock_qty,it_explan) values('1745137728','[도서구입] (8)익숙한 만남 - 최풍성 시집','','99999','')

1062 : Duplicate entry '1745137728' for key 1

error file : /home/klw/book_buy.php