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 ('e66a2d71f5bb9c28e51d0304062d882d', -1, 1711652904, 1711652904, '03d7b7c2', -2, 0, 0)

Line : 187
File : sessions.php