Google OAuth2 creates second identity instead of new user

Self-hosted 1.6.0 / Flutter

I am facing a strange problem. I was working with a user created with Google OAuth2, it was registered in the Authentication environment perfectly and all working smooth.

But , when I sign out and try to create a new User with a different email address (again with OAuth2 , Google), instead of creating a new User for that email address, it actually adds a 2nd identity to the same existing User , even after I have completely signed out , deleted the session, cleared the object in the listener.

I cannot understand why it happens , but as a workaround, I tried to locate the second identity in the User and delete it, but when I try to query the identities of the user with users.listIdentities (from dart_appwrite Users API), I get error 401 (role: guests).

Just to clarify , the API key has Users full permissions.