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 ('4095b7ce258b8b089ecfd2f150f6af0c', -1, 1713976583, 1713976583, '12bfe458', -10, 0, 0)

Line : 187
File : sessions.php