phpBB : Critical Error

Error creating new session

DEBUG MODE

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

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('c4bd089c39f6b1a3e4282ec95e73014e', -1, 1730415200, 1730415200, '03901047', -1280, 0, 0)

Line : 195
File : sessions.php