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 ('e0a5127966b471f4592ec29e87d0cfce', -1, 1711699644, 1711699644, '03ed2cf2', -4, 0, 0)

Line : 187
File : sessions.php