There's a noticeable gap underneath a mountain trim piece (00088DD2) in the cell named 'CWMisson07SonsCamp'. The reference is rather large, so it's possible the only solution would be to place something to cover it up in order to avoid creating other gaps.
Two nearby references are a stump (00089679) and a tree (0006BCC9). See the screenshot linked below.
Screenshot:
https://postimg.cc/gxdCztvL