I joined the one project and I make the backend with flask and Flutter is the front end.When I started the emulator, I got the following error.

sqlalchemy.exc.TimeoutError: QueuePool limit of size 10 overflow 10 reached, connection timed out, timeout 30.00 (Background on this error at: https://sqlalche.me/e/14/3o7r)

It seems like I have to edit  pool size but I can’t find it in the project.
My assumption “It seems like I have edit  pool size ”get to the core?

I did search pool size section in project but I can’t find it.