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 ('ee8dae21e7727ac2d163cb016224eb9c', -1, 1713567684, 1713567684, '12dafe7a', -4, 0, 0)

Line : 187
File : sessions.php