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] => 309675652 [:db_insert_placeholder_2] => 1713454211 [:db_insert_placeholder_3] => http://www.ppi.gov.bd/index.php/2016-05-12-10-07-08/2016-05-12-10-53-04/2016-05-12-10-57-23?p=digital_content&id=3 [:db_insert_placeholder_4] => https://ppi.gov.bd/index.php/2016-05-12-10-07-08/2016-05-12-10-53-04/2016-05-12-10-57-23?p=digital_content&id=3 [:db_insert_placeholder_5] => node/5 [:db_insert_placeholder_6] => Work Plan [:db_insert_placeholder_7] => claudebot ) in visitors_exit() (line 203 of /home/rgbd/ppi.gov.bd/sites/all/modules/visitors/visitors.exit.inc).