phpBB : Critical Error

Error creating new session

DEBUG MODE

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

INSERT INTO cantautore_phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin, is_robot) VALUES ('3795786f1d17ea391dca8796e8e8e3f5', -1, 1714192819, 1714192819, '1276e345', -7, 0, '0', '0')

Line : 175
File : sessions.php