Adding series with a ID of 0 is now blocked.

NzbDrone.Core.Test/ProviderTests/SeriesProviderTest.cs

@@ -46,6 +46,15 @@ namespace NzbDrone.Core.Test.ProviderTests
             series.First().SeasonFolder.Should().Be(useSeasonFolder);
         }
 
+
+        [TestCase(0)]
+        [TestCase(-1)]
+        public void add_series_should_fail_if_series_is_less_than_zero(int seriesId)
+        {
+            WithRealDb();
+            Assert.Throws<ArgumentOutOfRangeException>(() => Mocker.Resolve<SeriesProvider>().AddSeries("C:\\Test", seriesId, 1));
+        }
+
         [Test]
         public void find_series_empty_repo()
         {

NzbDrone.Core/Jobs/UpdateInfoJob.cs

@@ -50,7 +50,7 @@ namespace NzbDrone.Core.Jobs
             }
             else
             {
-                seriesToUpdate = new List<Series>() { _seriesProvider.GetSeries(targetId) };
+                seriesToUpdate = new List<Series> { _seriesProvider.GetSeries(targetId) };
             }
 
             //Update any Daily Series in the DB with the IsDaily flag

NzbDrone.Core/Providers/SeriesProvider.cs

@@ -104,6 +104,11 @@ namespace NzbDrone.Core.Providers
         {
             Logger.Info("Adding Series [{0}] Path: [{1}]", tvDbSeriesId, path);
 
+            if (tvDbSeriesId <=0)
+            {
+                throw new ArgumentOutOfRangeException("tvDbSeriesId", tvDbSeriesId.ToString());
+            }
+
             var repoSeries = new Series();
             repoSeries.SeriesId = tvDbSeriesId;
             repoSeries.Path = path;