Open inner region error

Hello All,

While opening inner region to create flow region, the body region disappears and only the flow region exists, Please find the link and screenshots below.
Kindly help me with the same.

https://www.simscale.com/workbench/?pid=4227624562786762695&mi=operation%3A12%2Cgeometry%3A9&mt=GEOMETRY_OPERATION![Capture|690x421](upload://vSudwIOSpzq0x0bkpOz4qL7DjU1.png)

Hey there, and thanks for using the forum!

The following toggle allows you to prevent the deletion of the part:

image

Anyway, I suggest you to make use of the CAD Edit mode, which will give you more features: