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 ('9fc2b84a2e02237ba707f7d21e291444', -1, 1752893200, 1752893200, 'd849d8fb', -2, 0, 0)

Line : 189
File : sessions.php