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 ('8b9ee7573b31ff387db9985702061ffc', -1, 1713284702, 1713284702, '0381f7c4', -4, 0, 0)

Line : 187
File : sessions.php