Error message

• Warning: Cannot modify header information - headers already sent by (output started at /home/alloste2/public_html/includes/common.inc:2608) in drupal_send_headers() (line 1239 of /home/alloste2/public_html/includes/bootstrap.inc).
• PDOException: SQLSTATE[42000]: Syntax error or access violation: 1142 DELETE command denied to user 'alloste2_drupal7'@'localhost' for table 'dr_semaphore': DELETE FROM {semaphore} WHERE (name = :db_condition_placeholder_0) AND (value = :db_condition_placeholder_1) AND (expire <= :db_condition_placeholder_2) ; Array ( [:db_condition_placeholder_0] => cron [:db_condition_placeholder_1] => 11749125095b4ebd156eaf18.19820405 [:db_condition_placeholder_2] => 1531887109.4534 ) in lock_may_be_available() (line 181 of /home/alloste2/public_html/includes/lock.inc).