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 ('019088230867127f48c9b0ec0a6c5bc8', -1, 1714042347, 1714042347, '340e554c', -10, 0, 0)

Line : 187
File : sessions.php