How do you change the succession law of a title?

[faiuwle]

Here is my event:

namespace = AFRREL

# Fix Eldership succession of new titles to prevent random primogeniture
character_event = {
    id = AFRREL.001
    hide_window = yes
    only_playable = yes
    is_triggered_only = yes
 
    trigger = {
        primary_title = {
            has_law = succ_eldership
        }
    }
 
    immediate = {
        any_demesne_title = {
            add_law = {
                law = succ_eldership
                cooldown = no
                opinion_effect = no
            }
        }
    }
}

Here is my on_action file in /common/on_actions:

on_create_title = {
    events = {
        AFRREL.001 # Fix Eldership
    }
}

on_new_holder = {
    events = {
        AFRREL.001
    }
}

so I would expect that the title would get Eldership succession if the primary title has Eldership, but it is still given primogeniture, even when primogeniture is not available, and all non-primary titles are change to primogeniture. Even if I fire the event manually with the console it does not work. What do I have to put in the event to make the succession law change? Changing succession laws in the history files works, why doesn't it work in an event? Is the vanilla Eldership event the only one where it works?

 

[Rydelfox]

Double-check if they meet the requirements for elder succession. If they don't, it might be switching to some fallback (though I'd expect that to be Gavelkind)