script: "Lost connection to server during query" only at "Adding PHP version(s) to ISPConfig" step

Hi,
when I try to add a new server to a multi-server setup using the script, it:

1. creates local DB, etc.
2. creates new user in master DB
3. always stops reporting lost connection to server. Connection is still ok, the problem is only when it performs the " Adding PHP version(s) to ISPConfig" step.

I don't know how to solve. Tried to rollback server's snapshot and try again, but I've same experience. It creates a new user in master DB, then hangs with same error:

30.03.2026-15:25:40 - /lib/os/class.ISPConfigDebianOS.inc.php:1367: [INFO] Installing packages fail2ban, ufw
30.03.2026-15:25:47 - /lib/os/class.ISPConfigDebianOS.inc.php:1370: [INFO] Installed packages fail2ban, ufw
30.03.2026-15:25:49 - /lib/os/class.ISPConfigDebianOS.inc.php:438: [INFO] Fixing dbconfig-common if neccessary
30.03.2026-15:25:49 - /lib/os/class.ISPConfigDebianOS.inc.php:1042: [INFO] Configuring SSHd
30.03.2026-15:25:49 - /lib/os/class.ISPConfigDebianOS.inc.php:2077: [INFO] Installing ISPConfig3.
30.03.2026-15:25:49 - /lib/os/class.ISPConfigDebianOS.inc.php:2163: [INFO] Your MySQL root password is: xxxxxxxxx
30.03.2026-15:29:09 - /lib/os/class.ISPConfigDebianOS.inc.php:2187: [INFO] Adding PHP version(s) to ISPConfig.
--------------
INSERT IGNORE INTO `ispconfig-r69`.`server_php` (`sys_userid`, `sys_groupid`, `sys_perm_user`, `sys_perm_group`, `sys_perm_other`, `server_id`, `client_id`, `name`, `php_fastcgi_binary`, `php_fastcgi_ini_dir`, `php_fpm_init_script`, `php_fpm_ini_dir`, `php_fpm_pool_dir`, `php_fpm_socket_dir`, `php_cli_binary`, `php_jk_section`, `active`, `sortprio`) VALUES (1, 1, 'riud', 'riud', '', 7, 0, 'PHP 5.6', '/usr/bin/php-cgi5.6', '/etc/php/5.6/cgi', '/etc/init.d/php5.6-fpm', '/etc/php/5.6/fpm', '/etc/php/5.6/fpm/pool.d', '/run/php', '/usr/bin/php5.6', 'php5_6', 'y', 0)
--------------

ERROR 2013 (HY000) at line 1: Lost connection to server during query
[ERROR] Exception occurred: ISPConfigOSException -> Command mysql --host='mysql.xxxxxx.xxxx' --user='ispcsrv7' --password='79cfca6ef08a8f720133895872f49490' -e 'INSERT IGNORE INTO `ispconfig-r69`.`server_php` (`sys_userid`, `sys_groupid`, `sys_perm_user`, `sys_perm_group`, `sys_perm_other`, `server_id`, `client_id`, `name`, `php_fastcgi_binary`, `php_fastcgi_ini_dir`, `php_fpm_init_script`, `php_fpm_ini_dir`, `php_fpm_pool_dir`, `php_fpm_socket_dir`, `php_cli_binary`, `php_jk_section`, `active`, `sortprio`) VALUES (1, 1, '\''riud'\'', '\''riud'\'', '\'''\'', 7, 0, '\''PHP 5.6'\'', '\''/usr/bin/php-cgi5.6'\'', '\''/etc/php/5.6/cgi'\'', '\''/etc/init.d/php5.6-fpm'\'', '\''/etc/php/5.6/fpm'\'', '\''/etc/php/5.6/fpm/pool.d'\'', '\''/run/php'\'', '\''/usr/bin/php5.6'\'', '\''php5_6'\'', '\''y'\'', 0)' failed. (/ispconfig.ai.php:15)


If I understand the SQL statement, there is something strange. "ispconfig-r69" is a DB the does NOT exist in master database. It is the name of the DB it has created on the local node. It seems that it is connecting to master DB, using right credential to work with master DB, to perform ad operation on a DB that exists only on local mariadb.

Any idea?
thanks