ward_travel_invalidation_effect

ward_travel_invalidation_effect = {
	if = {
		limit = {
			exists = var:ward_travelling_to_guardian
			OR = {
				# Ward is imprisoned
				is_imprisoned = yes
				# Ward has guardian already
				any_relation = { type = guardian }
				is_playable_character = yes

				var:ward_travelling_to_guardian = {
					is_alive = no
					# Guardian is jailed
					is_imprisoned = yes
					# Guardian has wards already
					num_of_relation_ward >= 2
				}
				NOT = { exists = var:ward_travelling_to_guardian }
				NOT = { exists = var:character_making_education_request }
			}
		}
		var:ward_travelling_to_guardian ?= { save_scope_as = guardian }
		save_scope_as = ward
		if = {
			limit = { exists = liege }
			liege = {
				save_scope_as = ward_liege
				send_interface_toast = {
					title = ward_invalidated_during_travel_title
					left_icon = scope:ward
					right_icon = scope:guardian
					show_as_tooltip = {
						scope:ward = { remove_relation_guardian = scope:guardian }
					}
				}
			}
		}
		scope:guardian ?= {
			send_interface_toast = {
				title = ward_invalidated_during_travel_title
				left_icon = scope:ward
				right_icon = scope:ward_liege
				scope:ward = {
					show_as_tooltip = { remove_relation_guardian = scope:guardian }
					current_travel_plan = {
						if = {
							limit = { can_cancel = yes }
							cancel_travel_plan = yes
						}
					}
					set_location_to_default = yes
				}
			}
			if = {
				limit = { is_alive = yes }
				remove_variable = guardian_waiting_for_ward
			}
		}
		if = {
			limit = { is_alive = yes }
			remove_variable = ward_travelling_to_guardian
			remove_variable = character_making_education_request
		}
		debug_log = "Ward invalidated during travel"
		debug_log_scopes = yes
	}
}

As written in game/common/scripted_effects/05_bp2_hostage_effects.txt.