System.InvalidOperationException: Can't use schemaId for type The same schemaId is already used for type code example

Example: the same schemaid is already used for type swagger

services.ConfigureSwaggerGen(options =>
   {
       //your custom configuration goes here
       // UseFullTypeNameInSchemaIds replacement for .NET Core
       options.CustomSchemaIds(x => x.FullName);
   });