[Majutsushi]

If you're talking about the "Collections columns" option in the driver settings, then there was already a recent change to Calibre that checks that configured columns exist. As for checking for automatic metadata management I can't really think of a good place where it would make sense to put that, but I'll think about it.

Edit: I just realized that you've already talked about this in a GitHub issue you opened some time ago. Although the same thing as with the automatic metadata management applies here: I'm not sure how this could be done in the plugin in a way that makes sense. At what point should it do this checking? When deleting a configured column? I'm not sure it's even possible to hook into that, and even if it is I'm not sure the plugin would be the right place for this rather than the driver itself where the columns are actually configured.