When I add an item to another list within a list, it becomes two lists instead of one

[Satvik_Kachhadiya]

When I add an item to another list within a list, it becomes two lists instead of one.

The second list is exactly the item added to it but the problem is that two lists are created instead of one list.

[Taifun]

remove the replace list item block

lists follow the call by reference logic, see also

Evaluation strategy | Call by reference

which means, modifying the sublist modifies the main list at the same time

Taifun