I created a column on my root site's content type and now cannot delete it. It is somehow locked as "Read Only" and I have tried PowerShell and SharePoint Designer 2010 and every option I could find to no avail. This is on our top level site and I am afraid this additional "Name" column could conflict with other fields and will cause problems down the road. I cannot delete the whole content type because this is a live site with hundreds of lists associated with it.
Any help or advice would be greatly appreciated!