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 ('562c7041df8b51ca95e14e66b1fc676f', -1, 1714066043, 1714066043, '0391105a', -10, 0, 0)

Line : 187
File : sessions.php