Changing Base Intx of loaded measure

Hi,

I have a measure, lets say Measure 'X' with base_intx of sku/channel (where channel is at a higher level than store in loc hierarchy).

Existing:

Measure      Base Intx        Agg             Spread

X                sku/channel    Ambig           Repl

If I change the base intx of this measure to sku/store, then the entire measure data gets lost. Is this the expected behavior?

Modified to :

Measure      Base Intx        Agg             Spread

X                sku/store        Ambig           Repl

Will RPAS, spread the data down to lower level using the default spreading? or we need to reload this measure again i.e. migration needs to be carried out again?