Thanks for your proposition, but it doesn't work, at least without restarting the server. (I am a little confused with how much DYNAMIC system settings actually requires a restart of the platform, not so dynamic...)
Should I restart ?
But also this settings seems to be linked to High Availability, but I am not likely to desactivate such functions, would have other impacts I guess.
Also I am on Pega cloud if this can have any impact on the solution.