How to make this data model in mysql?

Databases
1

Hi there

I am working on a web application where this is like multiuser-multiuser interaction with system

Abstarct is suppose I want to sell something and then I go on someone website and place my product for sale and that message will be send to backend operator of that website.problem is there is more than one backend user who serves request of user of that web application.I want to make something like if a frond end user has read message send by some user then that message will not go to other users.

But I am not getting any Idea how to implement it?

2

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