Product Configuration Re-using Configurations Bom Update Issue

I have AX2012 R3 configuration for constraint based configuration. Everthing works fine but when we want to use our old dimensions or variants so we set Re-use confgurations on configuration model to Yes. It works fine also but when we try to change bom lines of the product configuration, our older dimensions and boms are working with old calculation so for this reason our consuptions are gone wrong.