vlib/v/checker/tests/enum_field_value_duplicate_d.vv:6:6: error: enum value `1` already exists
    4 |     a = one
    5 |     b
    6 |     c = one
      |         ~~~
    7 | }
    8 |
Details: use `@[_allow_multiple_values]` attribute to allow multiple enum values. Use only when it is needed