Hi,
I checked your website and it looks like the filter "Размер детали" is working.
So I can't say much.
One thing though:
Supposing that you create a new filter and a new custom field and that it works for the new set but not with the old filter/custom field, if you want to rapidely move the data from one custom field to another for all your products, you can run a mass action with an action "update the values" where you select the column of the new custom field, select the "operation" mode, and enter "product.xxx" in the input field where "xxx" is to be replaced by the column name of the old custom field.