How to have different configurations for 2 instances of the same sub-assembly within one assembly ?

Hi there,

I have a top level assembly in which I inserted the same sub-assembly twice. I have different configurations in the sub-assembly. I would like to use the configuration #1 for the first sub-assembly and the configuration #2 for the second sub-assembly. My problem is that whenever I assigned a configuration to one of them, it automatically changes the other subassembly.

Any idea how to fix this ?

Thank you

SolidworksAssemblies