Why am I getting “A route named ‘swagger_docs’ is already in the route collection” after I publish my API App?

Why am I getting “A route named ‘swagger_docs’ is already in the route collection” after I publish my API App?https://www.dotnetzone.gr:443/cs/blogs/pkefal/archive/2015/04/04/why-am-i-getting-a-route-named-swagger-docs-is-already-in-the-route-collection-after-i-publish-my-api-app.aspxQuestion: After publishing my API App I’m getting the yellow error screen of ASP.NET. The error message says “A route named ‘swagger_docs’ is already in the route collection”. How can I fix this? Answer: This is not relatedelCommunityServer 2.1 SP3 (Build: 20423.1)