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 ('4a97cf034c6a87ba5d34e8224c9d629c', -1, 1752884112, 1752884112, 'd849d8fb', -8, 0, 0)

Line : 189
File : sessions.php