Retrofit Error (BC Set)

Hi

We are using Retrofit in Solman 7.1 SP12

I have a change which has conflicts (in CSOL) and therefore BC Sets have to be used.

Here is the change in Retrofit:

Here is the BC Set in system ATM:

:

And here is the error I'm getting in Solution Manager (Retrofit):

Any idea why I'm getting this and how to resolve?

Thanks
Shaun