EAN Number range

Hi Experts,

Currently for our Customized EAN category we have defined a broad number range(Ex: 100000 to 999999 and in production we already are using this Customized category.

Now we want to split that broad number range into several number ranges like : 100000 to 199999 = Z1, 200000 to 299999 = Z2 and have separate customized ean categories...

What are the drawbacks related to it, other than manually changing the customized ean category in production?

Thank you.