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 ('f983e72bb7de839cab60cb7d8b7d9f5f', -1, 1713919634, 1713919634, '0d3afc08', -4, 0, 0)

Line : 187
File : sessions.php