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 ('cd4e4e4380550b958a08c3427b033628', -1, 1711717134, 1711717134, '36e04694', 3, 0, 0)

Line : 187
File : sessions.php