Continue a numbered list (Roman numerals IV) in numbers (4.1...).

Hello, good afternoon, by any chance does anyone know how I can continue a numbering list from bullets in Roman numerals to numbers. (ID cs6)
Ex:
IV (Tier 1 Style)
4.1 (Tier 2 Style)

So far I can remove the roman style but the list has no parameter to reset.

Currently I only get this:
IV Title 1
IV.1 Title 2
with these configurations

https://prnt.sc/x23YJ1d3DzvG (Title level 1) ^#.^t
https://prnt.sc/Sq8N6Qdhk_hw (Title level 2) ^.1^#.^t

Thanks in advance.