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 ('f240523d49ac4b01930a8b74db87e929', -1, 1711719572, 1711719572, '035bcbee', -4, 0, 0)

Line : 187
File : sessions.php