Sap CCO mutiple barcode assign to single item

Hi Experts, i had an issue.

We are using CCO with B1 as backend.

On B1 the items has multiple barcode, each one corresponding to a size attribute that is entered on free text field on the Barcode Screen.

But in CCO, the item is imported and the barcode is a concatenation of all barcode on B1. Example

Itemcode: ABCD1234

Barcode 1: 000123401298

Barcode 2: 809102983438

in CCO

Itemcode ABCD1234

GTIN 000123401298809102983438

How can handle this to get barcode splitted and when is scanned get the same item.

Thanks in advance