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 ('71e71e6c2f5c91fcfd8b95a93c48a091', -1, 1711727353, 1711727353, '23af717d', -9, 0, 0)

Line : 187
File : sessions.php