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 ('024c64e3ad3d16326b9bf2457e9b0c1b', -1, 1714004438, 1714004438, '12d85e98', 3, 0, 0)

Line : 187
File : sessions.php