guardian_travel_invalidation_effect

guardian_travel_invalidation_effect = {
	if = {
		limit = {
			exists = var:guardian_travelling_to_ward
			OR = {
				# Guardian is imprisoned
				is_imprisoned = yes

				# Guardian has wards already
				num_of_relation_ward >= 2
				is_playable_character = yes

				var:guardian_travelling_to_ward = {
					is_alive = no
					# Ward is jailed
					is_imprisoned = yes
					# Ward has a guardian already
					any_relation = { type = guardian }
				}
				NOT = { exists = var:guardian_travelling_to_ward }
			}
		}
		var:guardian_travelling_to_ward ?= { save_scope_as = ward }
		save_scope_as = guardian
		scope:ward ?= {
			if = {
				limit = { exists = liege }
				liege = {
					save_scope_as = ward_liege
					send_interface_toast = {
						title = ward_invalidated_during_travel_title
						left_icon = scope:guardian
						right_icon = scope:ward
						show_as_tooltip = {
							scope:guardian = { remove_relation_ward = scope:ward }
						}
					}
				}
			}
			send_interface_toast = {
				title = guardian_invalidated_during_travel_title
				left_icon = scope:guardian
				scope:guardian = {
					show_as_tooltip = { remove_relation_ward = scope:ward }
					current_travel_plan = {
						if = {
							limit = { can_cancel = yes }
							cancel_travel_plan = yes
						}
					}
					set_location_to_default = yes
				}
			}
			if = {
				limit = { is_alive = yes }
				remove_variable = character_making_education_request
				remove_variable = ward_waiting_for_guardian
			}
		}
		if = {
			limit = { is_alive = yes }
			remove_variable = guardian_travelling_to_ward
		}
		debug_log = "Guardian invalidated during travel"
		debug_log_scopes = yes
	}
}

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