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 ('c32c0cef00e3c8f0286551dfaeba0f34', -1, 1713978143, 1713978143, '2cc96100', -8, 0, 0)

Line : 187
File : sessions.php