How do I split swatches from CAS item (2 package files)

I have 2 CC package files where the swatches are combined to one item in CAS.  First package is a cocktail dress from Birba32.  A modder cloned the Birba dress and added several swatches of lace textures.  I can delete the duplicate swatches in the modder file but the swatches from both files are still combined under one item in CAS.  I would like one CAS item for the Birba dress and a separate CAS item for the modded lace version. Is it possible to have them show as separate CAS items?

Many thanks to the community and an extra thankyou to anyone that can help.