The error message on this metric rename test says that there's a problem with the Wolfram language in a calculated metric. The calculated metric it's referring to looks like it's working correctly on the live site and the dev site, so it's unclear why the error is coming up
It looks like this one got fixed, too: https://dev.wikirate.org/Global_Reporting_Initiative+Solid_Poops
The issue probably had to do with the fact that the formula referenced the metric name. In phase II of these name changes I want to change things so that those are stored as ids; that would prevent many potential problems like this.