phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 2

INSERT INTO mex2mex_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in) VALUES ('4da9ea1e5b0e767ec4737c47b8c7e825', -1, 1397999960, 1397999960, '6b162d3d', 7, 0)

Line : 170
File : sessions.php