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 ('d11e3fff021d5ae852b01690c4b0208a', -1, 1711727167, 1711727167, '22e56e31', 5, 0, 0)

Line : 187
File : sessions.php