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 ('c71a2c04d38eb57280537e69ae34c4f1', -1, 1737483342, 1737483342, '12e3696e', 9, 0, 0)

Line : 187
File : sessions.php