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 ('0bb8c3ae965c3c8c1f1f3b0c2292c248', -1, 1711623881, 1711623881, '6b179d10', -10, 0, 0)

Line : 187
File : sessions.php