gen fail: TypeError(InvalidValue) on openAI scheme

Here's the scheme source https://github.com/openai/openai-openapi/blob/master/openapi.yaml

Here's the call:

RUST_BACKTRACE=1 cargo progenitor -i openapi.yaml -o openai -n openai -v 2.0.0

Here's the stack:

gen fail: TypeError(InvalidValue)
Error: generation experienced errors

Stack backtrace:
   0: std::backtrace::Backtrace::create
   1: anyhow::error::<impl anyhow::Error>::msg
   2: cargo_progenitor::main
   3: std::sys::backtrace::__rust_begin_short_backtrace
   4: std::rt::lang_start::{{closure}}
   5: std::rt::lang_start_internal
   6: _main

If to be used by macro generate_api!("/.../openai-openapi/openapi.json"); the error if different:

error   proc macro panicked ​rustc
                  message: Failed to make unique variant names for [Array,Array,Array]

Start by reproducing the failure with RUST_BACKTRACE=1 cargo progenitor -i openapi.yaml -o openai -n openai -v 2.0.0 using the linked OpenAI openapi.yaml. Compare it with the generate_api! invocation and its “Failed to make unique variant names” error. Done means the OpenAI schema no longer causes either generation path to fail.