Error message

• Warning: Cannot modify header information - headers already sent by (output started at /home/garsrjxs/www/drupal-7.42/includes/common.inc:2754) in drupal_send_headers() (line 1232 of /home/garsrjxs/www/drupal-7.42/includes/bootstrap.inc).
• PDOException: SQLSTATE[42000]: Syntax error or access violation: 1142 INSERT command denied to user 'garsrjxstable'@'10.10.20.138' for table 'drupal_watchdog': INSERT INTO {watchdog} (uid, type, message, variables, severity, link, location, referer, hostname, timestamp) 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, :db_insert_placeholder_8, :db_insert_placeholder_9); Array ( [:db_insert_placeholder_0] => 0 [:db_insert_placeholder_1] => cron [:db_insert_placeholder_2] => Attempting to re-run cron while it is already running. [:db_insert_placeholder_3] => a:0:{} [:db_insert_placeholder_4] => 4 [:db_insert_placeholder_5] => [:db_insert_placeholder_6] => http://gars.be/drupal-7.42/user/login?destination=node/6%23comment-form [:db_insert_placeholder_7] => [:db_insert_placeholder_8] => 98.81.24.230 [:db_insert_placeholder_9] => 1725837536 ) in dblog_watchdog() (line 163 of /home/garsrjxs/www/drupal-7.42/modules/dblog/dblog.module).