How to remove a sub-sub-menu in the left menu (from the info block) of Bitrix?

Question

1C-Bitrix

Hello. The essence of the problem lies in the fact that when creating elements (in my case, apartments) in folders with floors, and folders with floors are stored in folders with 2 entrances. Link to list of apartments with menu -> isk.srv1.zitz.ru/layout/floors_3_16/entrance_1/floor_3 . By clicking on the link, you may notice that elements have appeared from somewhere in the submenu (1 entrance -> 3rd floor), there are 3 links (1-room 2 type, 3-room, 4-room). In some floors, this is not the case, for example, on the 5th floor. The element settings are the same everywhere.