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 ('ffab6206efc8d9ffc9677ff58f5af217', -1, 1713496424, 1713496424, '12d974b7', -4, 0, 0)

Line : 187
File : sessions.php