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 ('685d67ce2ebb55c5e7956903ea196e2b', -1, 1711649330, 1711649330, '36add64f', -11, 0, 0)

Line : 187
File : sessions.php