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 ('6ec72b26ffe7a2772fe7eea2f7e75ca4', -1, 1714004946, 1714004946, '0390549b', -10, 0, 0)

Line : 187
File : sessions.php