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) VALUES ('d340ed3f52ced9b46e2204a1744c0bdc', -1, 1714602977, 1714602977, '0311ae9c', 16, 0)

Line : 158
File : sessions.php