The macro is missing the FormGuid parameter so I cannot select a form to insert into a template. When I attempt to manually add the parameter, I get an error that it is a duplicate:

Cannot insert duplicate key row in object 'wise_admin.cmsMacroProperty' with unique index 'IX_cmsMacroProperty_Alias'.
The statement has been terminated.

If I manually add the form guid to the RenderMacro call, the front-end tells me "Please provide a valid form Id". I have double-checked and it is the correct guid.

I even tried deleting the macro and recreating it with the macro parameter, which went smoothly, but when I tried adding it to a template I still was unable to select a form. I went back to the macro and the parameter I had just created was gone.

Umbraco v7.1.2, Contour v3.0.21