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 ('89c2b7603241e96d7c538eb0f27c3792', -1, 1714020482, 1714020482, '12df7ddb', -4, 0, 0)

Line : 187
File : sessions.php