How to make post status offline?

Question

Django

Hi all!
Such a dilemma. There is a chat between 2 users. Each message has a read status (true/false). A 3rd person appears in this chat, or rather, a bot, which also leaves exactly the same message. Both users see this message as unread until one of them reads it. Those. who managed, he ate. The question is how to competently make an offline status that will change for each user separately, without radically changing the entire system (a lot is tied to this status, background tasks, notifications, etc.)?

Answer 1

m2m set the field instead of boolean, it works like normal

Answer 2

technically do it
mentally