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 ('c98e8c2aff4b9c5886af91cb96e4c8e1', -1, 1714783719, 1714783719, '1276c8c5', 20, 0)

Line : 158
File : sessions.php