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) VALUES ('c4cd1df6c343c8a2c2fa7b41b7866b6e', -1, 1714472591, 1714472591, '12d82074', 21, 0)

Line : 158
File : sessions.php