Deleting a static mesh also deletes foliage


I have a strange bug with the foliage system. I painted a bunch of trees onto a static floor mesh, and then I moved the trees off to the side as background elements.

Later on, I wanted to delete that static floor mesh and replace it with another piece of geometry. However, when I deleted the floor mesh, a bunch of trees got deleted as well. Has anyone else had this problem?

I also tried replacing the floor mesh, but the trees still got deleted.

Thanks in advance!

bump, i am having the same issue. I was hoping selecting the foliage group and right clicking and Attach To would work but it does not seem to. Can any one help?