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 ('9d8ff90c9d7982b13a2bfa43c3774d2d', -1, 1711723121, 1711723121, '03ed208f', -1, 0, 0)

Line : 187
File : sessions.php