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 ('7857b2d6b25256d2152187ac7d0a3477', -1, 1713582209, 1713582209, '12e01e76', -2, 0, 0)

Line : 187
File : sessions.php