Thank you very much for your support.
Our MySQL version is Ver 14.14 Distrib 5.5.57.
And our i-MSCP current version is 1.2.9 and I was trying to upgrade to the latest stable one 1.5.1.
Please let me know how to proceed, do you need finally anything from my side or you fixed it with the new update?
Otherwise, please could you tell me about the installation mode? Is it better to use Auto or Manual mode?
This is because as I said before when doing the setup of the install it is asking me for users and passwords of each service (dovecot, vsftp, mysql, phpmyadmin, ...) and I do not know if the ones being prompted are the same credentials used in the past, I don't want to fuck all the existing data.
Thank you in advance.