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Fatal error: Uncaught mysqli_sql_exception: Column 'referral' cannot be null in /var/www/vhosts/allin-inclusion.eu/httpdocs/repositories.php:26 Stack trace: #0 /var/www/vhosts/allin-inclusion.eu/httpdocs/repositories.php(26): mysqli_stmt_execute() #1 {main} thrown in /var/www/vhosts/allin-inclusion.eu/httpdocs/repositories.php on line 26