SELECT 1 query not closed, it causes ps cannot able to do vacuum

[Abdulsametileri]

pid   |        duration         |          query_start          |       transaction_start       |        state        |                 user                 |                                query
---------+-------------------------+-------------------------------+-------------------------------+---------------------+--------------------------------------+---------------------------------------------------------------------
 2115263 | 17 days 06:16:46.746987 | 2026-03-09 14:09:31.699907+03 | 2026-02-20 07:53:01.698915+03 | idle in transaction | user_x              | SELECT 1

Postgre cannot able to do vacuum because of tx is opened. The team started a snapshot 17 days ago and finished but we cannot able to close related conns.