제로 보드를 설치했는데 가끔마다 보드 밑에 이렇게 나오는데 이건 뭐가 잘못 된거죠??

Warning: Unknown(): Your script possibly relies on a session side-effect which existed until PHP 4.2.3. Please be advised that the session extension does not consider global variables as a source of data, unless register_globals is enabled. You can disable this functionality and this warning by setting session.bug_compat_42 or session.bug_compat_warn to off, respectively. in Unknown on line 0