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 ('ca18225f15c5bb34f9cd0669b19199db', -1, 1730419528, 1730419528, '0391a2eb', -9, 0, 0)

Line : 195
File : sessions.php