puppetlabs/classifier — pull request #39 by aperiodic (2014-03-14 00:01:32+00:00)
Title: (NC-156) No 500 when PUTting an existing resource.

Environments and nodes just get a 200 now no matter what, since all their attributes are defined in the URI. Groups will get a 200 if the new group and the existing one are equal (modulo ID); if they are not, the server will respond with a 409.