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 ('15786523f7628f7a56d3faf79c8f7469', -1, 1730432238, 1730432238, '0389a445', -1, 0, 0)

Line : 195
File : sessions.php