Why does this route work for one endpoint but not another?

[lansana]

When I start my router, I get this error:

...
[GIN-debug] GET    /v1/taxes/:taxId          --> microservices/wwwapi/controller.(*TaxController).FindByID-fm (7 handlers)
[GIN-debug] PUT    /v1/taxes/:taxId          --> microservices/wwwapi/controller.(*TaxController).UpdateByID-fm (7 handlers)
[GIN-debug] DELETE /v1/taxes/:taxId          --> microservices/wwwapi/controller.(*TaxController).SoftDeleteByID-fm (7 handlers)
[GIN-debug] GET    /v1/users/username/:userId --> microservices/wwwapi/controller.(*UserController).FindByUsername-fm (7 handlers)
[GIN-debug] GET    /v1/users/:userId         --> microservices/wwwapi/controller.(*UserController).FindByID-fm (7 handlers)
panic: wildcard route ':userId' conflicts with existing children in path '/v1/users/:userId'
...

But the error makes no sense because if you look at the taxes endpoint, it has a GET, PUT, and DELETE all on the same /v1/taxes/:taxId endpoint, but when I try it for the users endpoint it gives me that error.

Why is this happening? Makes no sense... you'd think it would give me the same error for both endpoints.

[lansana]

Never mind, figured it out. Apparently I can't have a path like /users/foo in combination with /users/:id, and have to use something like /users/:id/foo instead.