error for localhost

I use my localhost to login or post comment always have this error message.
But if i don't use localhost,not this problem.
PDOException：SQLSTATE[22007]: Invalid datetime format: 1366 Incorrect integer value: '' for column 'ip' at row 1: INSERT INTO {ip_tracker} (uid, ip, visits, first_visit, last_visit) VALUES (:db_insert_placeholder_0, :db_insert_placeholder_1, :db_insert_placeholder_2, :db_insert_placeholder_3, :db_insert_placeholder_4); Array ( [:db_insert_placeholder_0] => 3 [:db_insert_placeholder_1] => [:db_insert_placeholder_2] => 1 [:db_insert_placeholder_3] => 1362671323 [:db_insert_placeholder_4] => 1362671323 ) 於 ip_tracker_user_save() (XXX\htdocs\eguide\sites\all\modules\ip\ip.module 中的第 150 行)。