phpBB : Critical Error

Error creating new session

DEBUG MODE

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

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('9e01647aeab245b1dd162a3d87eb8978', -1, 1268290426, 1268290426, '266bbf64', 0, 0, 0)

Line : 187
File : sessions.php