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 ('6d4a7e2a8133aa83a2228bc1942e0688', -1, 1714616119, 1714616119, '12d96c0b', -4, 0, 0)

Line : 187
File : sessions.php