Spreading values from chain level measure to Store level Measure

I have the following measures:

Measure1 is at week-item-store. Has spread_type as prop

Measure 2 is at week-item-chn

Measure 1 has following values

Store1, Item1, Week1, 13

Store2, Item1, Week1, 17

Measure 2 has following values

Chn1, Item1, Week1, 30

Now I set the Measure 2 value as follows

Chn1, Item1, Week1, 30000

Then i execute the following rule

mace -d . -run -expression "Measure1.level([loc].[chn])=Measure2"

I expect the result to be as follows for Store level measure

Store1, Item1, Week1,13000

Store2, Item2, Week1, 17000

But I don't see the values changing. What should be the expression for the chain level value to spread across 2 stores proportionately?