1 files changed, 3 insertions, 1 deletions
diff --git a/MediaBrowser.Controller/Entities/TV/Season.cs b/MediaBrowser.Controller/Entities/TV/Season.cs
index 181b9be2b..e3fbe8e4d 100644
--- a/MediaBrowser.Controller/Entities/TV/Season.cs
+++ b/MediaBrowser.Controller/Entities/TV/Season.cs
@@ -10,6 +10,7 @@ using System.Text.Json.Serialization;
 using Jellyfin.Data.Entities;
 using Jellyfin.Data.Enums;
 using Jellyfin.Extensions;
+using MediaBrowser.Common;
 using MediaBrowser.Controller.Dto;
 using MediaBrowser.Controller.Providers;
 using MediaBrowser.Model.Querying;
@@ -19,6 +20,7 @@ namespace MediaBrowser.Controller.Entities.TV
     /// <summary>
     /// Class Season.
     /// </summary>
+    [RequiresSourceSerialisation]
     public class Season : Folder, IHasSeries, IHasLookupInfo<SeasonInfo>
     {
         [JsonIgnore]
@@ -132,7 +134,7 @@ namespace MediaBrowser.Controller.Entities.TV
                 var series = Series;
                 if (series is not null)
                 {
-                    return series.PresentationUniqueKey + "-" + (IndexNumber ?? 0).ToString("000", CultureInfo.InvariantCulture);
+                    return series.PresentationUniqueKey + "-" + IndexNumber.Value.ToString("000", CultureInfo.InvariantCulture);
                 }
             }