What would you do?

Long story short, a couple of our neighbours have fallen out with each other over their children playing together. We still speak to both parties (only one set of neighbours have told us about the fall out, the other haven’t mentioned anything).

Our son is having a party at the weekend and we have invited both ‘spatting’ neighbours kids. I feel a bit awkward, and not sure whether to pre-warn the neighbours who have told us about the falling out.. what would you do in this situation?

I kinda feel like they might be expecting us to have invited the other neighbour, but don’t want it to come to them asking why we didn’t tell them? I just don’t know what to do for the best. I feel very awkward about ‘pre-warning them’, but is that the best thing to do?