update isod.tbcase_act tbact
set message_received_from =
(
select string_agg(concat_ws(' ', last_name, first_name, middle_name), ', ') from isod.tbcitizen
where citizen_id in (select citizen_id from isod.tbmessage_received_from where act_id = tbact.act_id)
)
where act_id in (select act_id from isod.tbmessage_received_from);