tournament_contest_replace_qualifier_effect

tournament_contest_replace_qualifier_effect = {
	$NEW_CONTESTANT$ = { save_scope_as = new_contestant }
	$OLD_CONTESTANT$ = { save_scope_as = old_contestant }
	remove_from_guest_subset = {
		name = qualified
		target = scope:old_contestant
		phase = tournament_phase_$CONTEST$
	}
	add_to_guest_subset = {
		name = spectator
		target = scope:old_contestant
		phase = tournament_phase_$CONTEST$
	}
	add_to_guest_subset = {
		name = qualified
		target = scope:new_contestant
		phase = tournament_phase_$CONTEST$
	}
	scope:old_contestant = {
		remove_variable = contest_aptitude
		remove_variable = progress_to_victory
		save_scope_as = disqualify_target
	}
	scope:new_contestant = {
		tournament_set_current_aptitude_variable_effect = yes
		set_variable = {
			name = progress_to_victory
			value = progress_to_victory_active_contestant_value
		}
	}
	scope:activity = {
		every_attending_character = {
			limit = { is_ai = no }
			send_interface_toast = {
				title = tournament_qualifier_replaced_toast
				left_icon = scope:old_contestant
				right_icon = scope:new_contestant
				custom_description = {
					text = tournament_contest_replaced_tt
					subject = scope:new_contestant # REPLACER
					object = scope:old_contestant # REPLACED
				}
			}
		}
	}
}

As written in game/common/scripted_effects/04_dlc_ep2_tournament_effects.txt.