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 ('6aea53dcaae4f7b86dc3b7042ddcb8d7', -1, 1713300885, 1713300885, '039137a9', -9, 0, 0)

Line : 187
File : sessions.php