[Help] Error Session_Regenerate_Id When Login

Hi All,

I used chrome,when I login in 2 tap with 2 user. In last tap, error is

session_regenerate_id() [<a href='function.session-regenerate-id'>function.session-regenerate-id</a>]: Session object destruction failed

Sometime, it auto logout to LoginForm. Please tell me what error and how to fix it? Thanks

Seems to be a yii issue.