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 ('0d4c47894d256b0981aaa144dc79b1a7', -1, 1711728008, 1711728008, '035b2b16', -4, 0, 0)

Line : 187
File : sessions.php