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 ('175e097d435f7a36ea57a2d95c2389ab', -1, 1781015129, 1781015129, 'd849d8e6', -10, 0, 0)

Line : 189
File : sessions.php