Resolved this after some debugging. As it turns out, fully_qualified_name was actually a null value causing this issue, to resolve I manually constructed the fully_qualified_name. The docs imply that this should be an accessible field but it appears not. I didn't confirm, but I suspect it's related to the fact that I'm making these changes as part of an upgrade from a legacy version (0.54) to a newer version (1.1.3).