I have come across something I have never seen before and am unsure how to proceed.

I have a set of deli-slider doors that I have used pack and go on so that I can create a different unit with some similarities. I even used a suffix when I did the pack and go to help distinguish parts. All was sent to a new folder.

However, when I go to change a part I get a warning about features defined in another assembly.

If I open the external links dialogue there are three. Is it okay to select break all? Will this fix this issue or create issues in the other assembly?