Continous Audience Sync - Audience Already Mapped?

I'm loving the new continuous audience sync feature, but one of my Facebook audiences must have already been synced with a list on Marketo. I'm sure I've deleted the list, and now I want to sync a new list instead. When I try to sync my new list I get an error saying "Audience Already Mapped". Is there any way I can see what list is mapped to that audience?