I thought this Idea already existed, but can't find it. So if it's a duplicate please delete this one.

When changing Item Type definition in a dgnlib, it does not seem to be possible to overwrite it in the active DGN. For any other library element it is possible (display styles, layers, text/dim styles, ...).

There is an indication that the Item Type is different from the library definition. But the button to "Reset" or "Update from Library", like it exists in other windows, is missing for Item Types.