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 ('6ff410296dc0d56f5f7d54053b2d8674', -1, 1754848681, 1754848681, 'd849d8fd', 2, 0, 0)

Line : 189
File : sessions.php