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 ('b4fe0d4a265f2490e4899da0c7e3b0d2', -1, 1713500400, 1713500400, '12de7794', -7, 0, 0)

Line : 187
File : sessions.php