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 ('769d19bef05d7112aa4f99bfc85ad7ac', -1, 1713864896, 1713864896, '031042ce', -2, 0, 0)

Line : 187
File : sessions.php