Error message

PDOException: SQLSTATE[HY000]: General error: 1364 Field 'visitors_id' doesn't have a default value: INSERT INTO {visitors} (visitors_uid, visitors_ip, visitors_date_time, visitors_url, visitors_referer, visitors_path, visitors_title, visitors_user_agent) VALUES (:db_insert_placeholder_0, :db_insert_placeholder_1, :db_insert_placeholder_2, :db_insert_placeholder_3, :db_insert_placeholder_4, :db_insert_placeholder_5, :db_insert_placeholder_6, :db_insert_placeholder_7); Array ( [:db_insert_placeholder_0] => 0 [:db_insert_placeholder_1] => 316683722 [:db_insert_placeholder_2] => 1713454234 [:db_insert_placeholder_3] => http://www.ppi.gov.bd/?p=digital_content&id=6 [:db_insert_placeholder_4] => http://ppi.gov.bd/?p=digital_content&id=6 [:db_insert_placeholder_5] => node/1 [:db_insert_placeholder_6] => Home [:db_insert_placeholder_7] => claudebot ) in visitors_exit() (line 203 of /home/rgbd/ppi.gov.bd/sites/all/modules/visitors/visitors.exit.inc).