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 ('4742b144663be3a300aa8f630932e9ef', -1, 1713863989, 1713863989, '1276b8ed', -7, 0, 0)

Line : 187
File : sessions.php