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 ('0611d2ee0c54b98c2a717d4b62687458', -1, 1713954179, 1713954179, '0380c758', 6, 0, 0)

Line : 187
File : sessions.php