How to make category re-copy downstream when changed in ZMIN

Dear all,

I have a requirement to adjust multi-level category when need to in ZMIN - and - by doing this make all downstream documents (ZMCR, ZMHF) to receive a new copy of categorization from ZMIN.

For now it works like this:

I create incident with 4-level categorization filled in

then create ZMCR from it - the categorization got copied over

then create ZMHF from ZMCR - the categorization got copied over

Now I am changing categorization in ZMIN, and at this point nothing happens in ZMCR, ZMHF - categorization stays old in the follow-on documents.

Is there any additional action or something I can schedule to get category updated ?

Thank you

Elena