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 ('2b64e1a65c21c1a34c4658c375e1f82b', -1, 1711640329, 1711640329, '2cc81785', -10, 0, 0)

Line : 187
File : sessions.php