It is impossible to use a province event to add traits to it's owner correct?

[Cliffracer RIP]

province_event = { # Peasants take power ending revolt
	id = 40109

	picture = "event_prosperity"

	trigger = {
		condition = { type = has_province_effect value = { revolt = yes } }
		condition = { type = not value = type = peasant_loyalty value = 0.5 }
		condition = { type = owner
			condition = { type = trait value = user_defined_b }
			condition = { type = trait value = merciful }
			condition = { type = has_law value = { royal_preorgatory_law = yes } }
			condition = { type = has_law value = { elective_law = yes } }
		}
	}

	mean_time_to_happen = {
		months = 1

	}

	action_a = { # Mild Reforms
		ai_chance = 25
		effect = { type = remove_province_effect value = revolt }
		effect = { type = peasant_loyalty value = 0.2 }
		effect = { type = peasant_power value = 0.1 }
		effect = { type = owner
			effect = { type = add_trait value = wise }
			effect = { type = add_trait value = forgiving }
		}
	}

	action_b = { # Radical Reforms
		ai_chance = 50
		effect = { type = remove_province_effect value = revolt }
		effect = { type = peasant_loyalty value = 0.4 }
		effect = { type = peasant_power value = 0.2 }
		effect = { type = owner
			effect = { type = add_trait value = just }
			effect = { type = add_trait value = vengeful }
		}
	}

	action_c = { # Social Revolution
		ai_chance = 20
		effect = { type = remove_province_effect value = revolt }
		effect = { type = peasant_loyalty value = 0.4 }
		effect = { type = peasant_power value = 0.2 }
		effect = { type = owner
			effect = { type = add_trait value = reckless }
			effect = { type = add_trait value = vengeful }
		}
	}

	action_d = { # Crush Them!
		ai_chance = 5
		effect = { type = peasant_loyalty value = -0.4 }
		effect = { type = owner
			effect = { type = add_trait value = cruel }
			effect = { type = add_trait value = deceitful }
		}
	}
}

As part of my recent crash-course in error management I've run into a problem with the effects for this event. I'm trying to use a province event to add traits to it's owner; am I to take it that this is actually impossible? Or am I just not doing it correctly?

[Cliffracer RIP]

Please answer this question someone, I need to know whether to rewrite my event chain or not. I can do it without being able to change the rulers traits, but it would be longer and require more events.

[performer]

You have to use a "workaround". Rewrite the event as a character event and use a decent prov trigger:

charevent = xxxx
trigger = {
condition = { type = any_demesne_province
condition = { type = has_province_effect value = { revolt = yes } }
}
action_a = {
effect = { type = add_trait value = wise }
}
}