problem in the classification of the products

Hi every body

look at this please: we have two class for finish products : class type (Z01) that fill up in the master data of materials

and class type (023) that fill up in the confirmation of products (some information in class type 023 come from class type Z01)

Now I explain our problem : in the some products we change the class type Z01 (Cass per pallet in this example changed from 80 cs to 60 cs)

but when we confirm the products , last information come from Z01 to class 023

please help to me

Best regards