Hangfire.MySql.MySqlStorage: Error: An item with the same key has already been added. Key: sslMode

我在使用Hangfire时，进入Hangfire看板页面的时候出现错误提示，虽然不影响使用。有没有人知道问题怎么解决
错误提示

Hangfire.MySql.MySqlStorage: Error: An item with the same key has already been added. Key: sslMode

 public void ConfigureServices(IServiceCollection services)
        {
            services.AddControllers();
            services.AddHangfire(configuration => configuration
                .SetDataCompatibilityLevel(CompatibilityLevel.Version_170)
                .UseSimpleAssemblyNameTypeSerializer()
                .UseRecommendedSerializerSettings()
                .UseStorage(new MySqlStorage(Configuration.GetConnectionString("Default"), new MySqlStorageOptions
                {
                    DashboardJobListLimit = 1000
                }
            )));
            services.AddHangfireServer();
        }
        public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
        {
            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
            }
            app.UseHangfireDashboard(); //使用hangfire面板

            app.UseHttpsRedirection();

            app.UseRouting();

            app.UseAuthorization();

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