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 ('18aeeed36d7431d6a504581dac04a358', -1, 1713889202, 1713889202, '03119aab', -4, 0, 0)

Line : 187
File : sessions.php