Get the previous values when I duplicate Parent and Child

Hi,

I have an app that allows me to duplicate both Parents and Children using a bot, and I would like to transfer the previous values to the new children

The “previous total” column in the parent table is a sum of the “previous value” from child table

“value” in the child table are added manually

This are the tables

Parent table (the second row is the copy)

Id description Total previous total
sfa44 description 1 100
sasak description 2 300 100

Children table

Id Id parents description detail value previous value
12s sfa44 detail 1 60
33d sfa44 detail 2 40
76s sasak detail 1 100 60
as3 sasak detail 2 200 40

whats is the best way to get previous values in another column when I create a child table

thanks!

The answer seems obvious to me; in the child copying action, put the [value] values into the [previous value] column. So I’m probably not understanding something here…

I have tried complex formulas and bots , but the solution was easy and obvious. thanks @Marc_Dillon