I have inherited a .NET 6 Web API project utilising OData and the Asp.Versioning packages. The versioning functionality was not 100% correct, and now that the project is required for more regular usage, I want to implement the versioning correctly.

The issue I am hitting is this runtime exception:

Attribute routes with the same name 'odata/v{version:apiVersion}/Parts' must have the same template: Action: '...v2.Controllers.PartsController.Get' - Template: 'odata/v{version:apiVersion}/Parts/odata/v{version:apiVersion}/Parts' Action: '...v2.Controllers.PartsController.Get' - Template: 'odata/v{version:apiVersion}/Parts' Action: '...v1.Controllers.PartsController.Get' - Template: 'odata/v{version:apiVersion}/Parts' Action: '...v1.Controllers.PartsController.Get' - Template: 'odata/v{version:apiVersion}/Parts'

My controllers look like:

namespace ...v1.Controllers
{
    [ApiController]
    [ApiExplorerSettings(GroupName = "v1")]
    [ApiVersion("1")]
    [Route("odata/v{version:apiVersion}/[controller]")]
    public class PartsController : ODataController
    {
        [Produces("application/json")]
        [EnableQuery]
        [HttpGet]
        public async Task<IQueryable<Part>> Get()
        {
            ...
        }
    }
}

and

    namespace ...v2.Controllers
    {
        [ApiController]
        [ApiExplorerSettings(GroupName = "v2")]
        [ApiVersion("2")]
        [Route("odata/v{version:apiVersion}/[controller]")]
        public class PartsController : ODataController
        {
            [Produces("application/json")]
            [EnableQuery]
            [HttpGet]
            public async Task<IQueryable<Part>> Get()
            {
                ...
            }
        }
    }

and my Startup.cs has the following configuration:

public void ConfigureServices(IServiceCollection services)
{
   ...
    services.AddControllers()
    .AddOData(options =>
    {
        options.EnableQueryFeatures(maxTopValue: 8000);
        options.TimeZone = TimeZoneInfo.Utc;
    });

    services.AddApiVersioning(options =>
    {
        options.AssumeDefaultVersionWhenUnspecified = true;
        options.DefaultApiVersion = new ApiVersion(1);
        options.ReportApiVersions = true;
        options.ApiVersionReader = new UrlSegmentApiVersionReader();
    })
    .AddMvc()
    .AddOData(options =>
    {
        options.AddRouteComponents("odata/v{version:apiVersion}");
    })
    .AddODataApiExplorer(options =>
    {
        options.GroupNameFormat = "'v'V";
        options.SubstituteApiVersionInUrl = true;
    });
    ...
}

public void Configure(IApplicationBuilder app)
{
    ...
    app.UseRouting();

    app.UseEndpoints(endpoints =>
    {
        endpoints.MapControllers();
    });
    ...
}

I feel like there is some small piece of config that I've missed, but struggling to find what that might be.