unity4.6.5f1烘焙报错

unity烘焙报错,改了地形名称之后还是报错
下面是错误信息
Something went wrong in the Beast lightmapper: Duplicate name - An instance named Terrain not-TreeInstance-0 already exists
This is a bug - please report it with a scene reproducing the issue.

UnityEditor.DockArea:OnGUI()

错误信息中的Terrain not-TreeInstance-0我都找不到在哪。

你换个版本呢?这个版本太老了,看错误提示说的就是一个bug,换一个稍微新一点版本18啊19啊之类的