Field type {field name} is not installed properly. Go to the list settings page to delete this field.
According to most of the documentation out there, the only possible way to delete this column is with a database query. obviously that is out of the question. The next best solution is to contact Microsoft. Can SharePoint Stackexchange do any better?
Reference:
- Remove Corrupted Site column
- Removing a Corrupted Site Column in SharePoint 2010
- Corrupt site column cannot be deleted
My points :
- Cannot delete via the browser, as the page doesn't load with the above error
- Cannot delete with powershell, as iterating the
SPWeb.Fields
property gives the same error - I'm currently looking into recreating a list with a reference to it