insert into counter set visit_date = '2017-12-18 20:03:34', visit_url = 'tntnhospital.co.kr/main/index.php?src=text&kw=000003', visit_ip = '54.92.201.232'

1062 : Duplicate entry '2017-12-18 20:03:34' for key 1

error file : /main/index.php