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 ('251c6c2c050dcd4c4bc16d61bfea2b51', -1, 1714726688, 1714726688, '0390c181', -9, 0)

Line : 158
File : sessions.php