Today I found the yjs auto changed the client id:
Changed the client-id because another client seems to be using it
when the client id will changed and how to avoid it? BTW, I only opened one tab and no login with same user in other browser.
Never manually set the client-id. That’s how you avoid this warning 
I did not set the client id manually, maybe I should check my code and found out where to set the client id unexpected.