Error message

• Warning: Cannot modify header information - headers already sent by (output started at /web/htdocs/www.aiac.org/home/includes/common.inc:2704) in drupal_send_headers() (line 1218 of /web/htdocs/www.aiac.org/home/includes/bootstrap.inc).
• PDOException: SQLSTATE[42000]: Syntax error or access violation: 1142 INSERT command denied to user 'Sql559400'@'62.149.145.156' for table '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://www.aiac.org/it/andrea-carandini-compie-80-anni-e-torna-la-sapienza [:db_insert_placeholder_7] => [:db_insert_placeholder_8] => 18.212.243.191 [:db_insert_placeholder_9] => 1561574166 ) in dblog_watchdog() (line 154 of /web/htdocs/www.aiac.org/home/modules/dblog/dblog.module).