Sonarr version (exact version): 4.0.13.2932
OS: Windows 10
Debug logs: Debug Logs
Description of issue: I recently updated Sonarr, and when it scanned and readded all of my shows it went ahead and added all seasons for all shows and attempts to download all the seasons of, say, survivor. Starting today I am suddenly unable to shut off monitoring for seasons. It thinks for a moment and then it slides back to monitored, and my debug log throws an error:
[v4.0.13.2932] NzbDrone.Host.TerminateApplicationException: Application is being terminated. Reason : Another instance is already running
at NzbDrone.Host.SingleInstancePolicy.PreventStartIfAlreadyRunning() in ./Sonarr.Host/SingleInstancePolicy.cs:line 37
at NzbDrone.Host.Startup.EnsureSingleInstance(Boolean isService, IStartupContext startupContext, ISingleInstancePolicy instancePolicy) in ./Sonarr.Host/Startup.cs:line 309
at NzbDrone.Host.Startup.Configure(IApplicationBuilder app, IContainer container, IStartupContext startupContext, Lazy1 mainDatabaseFactory, Lazy1 logDatabaseFactory, DatabaseTarget dbTarget, ISingleInstancePolicy singleInstancePolicy, InitializeLogger initializeLogger, ReconfigureLogging reconfigureLogging, IAppFolderFactory appFolderFactory, IProvidePidFile pidFileProvider, IConfigFileProvider configFileProvider, IRuntimeInfo runtimeInfo, IFirewallAdapter firewallAdapter, IEventAggregator eventAggregator, SonarrErrorPipeline errorHandler) in ./Sonarr.Host/Startup.cs:line 222
at System.RuntimeMethodHandle.InvokeMethod(Object target, Span`1& arguments, Signature sig, Boolean constructor, Boolean wrapExceptions)
at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object parameters, CultureInfo culture)
at Microsoft.AspNetCore.Hosting.ConfigureBuilder.Invoke(Object instance, IApplicationBuilder builder)
at Microsoft.AspNetCore.Hosting.ConfigureBuilder.<>c__DisplayClass4_0.b__0(IApplicationBuilder builder)
at Microsoft.AspNetCore.Hosting.GenericWebHostBuilder.<>c__DisplayClass15_0.b__1(IApplicationBuilder app)
at Microsoft.AspNetCore.Mvc.Filters.MiddlewareFilterBuilderStartupFilter.<>c__DisplayClass0_0.g__MiddlewareFilterBuilder|0(IApplicationBuilder builder)
at Microsoft.AspNetCore.Hosting.GenericWebHostService.StartAsync(CancellationToken cancellationToken)
2025-02-27 19:26:59.7|Info|Bootstrap|Application is being terminated. Reason : Another instance is already running
But I can’t find another instance of Sonarr running anywhere. This is extremely frustrating as it was working perfectly.