WordPress database error: [Deadlock found when trying to get lock; try restarting transaction]
DELETE FROM `wp_options` WHERE `option_name` = '_site_transient_wp_theme_files_patterns-117871e289706c9c9e79a2497a9b687e'

Warning: Cannot modify header information - headers already sent by (output started at /var/www/html/wp-includes/class-wpdb.php:1849) in /var/www/html/wp-includes/pluggable.php on line 1435 Warning: Cannot modify header information - headers already sent by (output started at /var/www/html/wp-includes/class-wpdb.php:1849) in /var/www/html/wp-includes/pluggable.php on line 1438