I'm not a Sharepoint admin (we currently don't have one), I'm just trying to help. I have a list in Sharepoint that used to have columns in it that, I believe, came from a custom content type. That content type has since been deleted. One of the columns (Workspace) that's no longer in the list is preventing someone from creating a chart based on the list. The column can be selected when editing or creating a view for the list, but can not be seen when looking at the columns in the List Settings. When I add the column to a view it doesn't have any values in it for that particular list.
Has anyone ever had a similar problem or have any idea as to how I would go about fixing this?