This is about the exact opposite of my previous post.
However, there are times where I get an event created a bit earlier than the organizer creates it on FB.
Is it possible to then link the existing event to pull in data from FB, BUT not remove any links/prices/etc that arent part of the normal FB event sync.
We do not have a feature to connect an existing event to the Facebook event.
If you think that is something you would like as a feature I encourage you to visit our User Voice Page and either upvote an existing request or make a new request there.