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 ('67b5f9be7ada032e0e33b803c1f082e9', -1, 1711618269, 1711618269, '36e27e26', -4, 0, 0)

Line : 187
File : sessions.php