fluent网格画分后报错The mesh exporter dose not support overlapping geometry

fluent网格画分时保错:The mesh file exporter does not support overlapping geometry in named selections. Please resolve the issue and try again. You can use the option “Show Geometry in Overlapping Named Selections” (when you right click on the Mesh branch of the tree) to help diagnose the problem.
翻译过来就是:网格文件导出器不支持命名选择中的重叠几何图形。请解决该问题，然后重试。您可以使用选项“在重叠命名的选择中显示几何形状”(当您右键单击树的网格分支时)来帮助诊断问题。
这该怎么解决？多谢各位