Fatal error: Uncaught mysqli_sql_exception: Expression #12 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'nfz2023.ak.id' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by in /var/www/html/class/mysql.class.php:53 Stack trace: #0 /var/www/html/class/mysql.class.php(53): mysqli_query() #1 /var/www/html/class/aktualnosci.class.php(526): mysql->select() #2 /var/www/html/php/strony/pacjenci.php(27): aktualnosci->getWiadomosciDzialuArchiwum() #3 /var/www/html/php/strony/show.php(12): require_once('...') #4 /var/www/html/index.php(107): require_once('...') #5 {main} thrown in /var/www/html/class/mysql.class.php on line 53