I clearly remember my user ID was 1310070 few days back and my profile link was
But recently I observed this link gives me 404 and my profile link has been transferred to
This means my userId has also been changed. Few questions in my mind:
- Why did the user IDs change? They were supposed to be unique.
- Is there any way I can see which user IDs changed or did it happen to all users?
I built a chrome extension StackEye - which allows to follow other users/questions. It works on userIds and data is stored in localStorage. Now all the extension users might have followed some users on StackExchange sites and now they won't be getting notification of questions/answers because user IDs have changed or they might be getting wrong data.
What should I do in this case?