Gridmap: problem adding meshes to meshlib

Godot Version

4.4/4.5/4.6 beta

Question

Hi,

I tried to upgrade and improve on some meshes from a meshlib and in the process i added some extra meshes. When i reloaded the scene the gridmap was all messed up, obvously adding to or modifying the meshlib had confused the gridmap. Is there a way of manually assigning meshes to which slot of the meshlib they should overwrite?

The gridmaps are quick and easy for prototyping and i would prefer to refine the maps that ive already drawn, perhaps even swap out entire meshlibs.