Linq with if Condition and Datatable Update

initial it should look like this

each datarow is belonging to its datatable and is referencing it via the Navigation Property: Table. So when working with the datarow it is also relected within the datatable

Acting like a local loop variable. Reflecting the looped group member datarow.

We shared some links and also described it here:

Experiments can be done e.g. within the immediate panel
Understanding the 6 Debugging Panels of UiPath in the easiest way possible! - News / Tutorials - UiPath Community Forum

We hope you can finalize the modelling and the topic can be closed:
Forum FAQ - How to mark a post as a solution - News / Tutorials - UiPath Community Forum