error: symbol `__kaptan_error_id_77` is already defined
  --> tests/ui/duplicate_id_across_enums.rs:28:17
   |
28 | #[derive(Debug, KaptanError)]
   |                 ^^^^^^^^^^^
   |
   = note: this error originates in the derive macro `KaptanError` (in Nightly builds, run with -Z macro-backtrace for more info)