diff --git a/Emby.Naming/Video/VideoListResolver.cs b/Emby.Naming/Video/VideoListResolver.cs
index 7f755fd25e..948fe037b5 100644
--- a/Emby.Naming/Video/VideoListResolver.cs
+++ b/Emby.Naming/Video/VideoListResolver.cs
@@ -227,7 +227,7 @@ namespace Emby.Naming.Video
             }
 
             return remainingFiles
-                .Where(i => i.ExtraType == null)
+                .Where(i => i.ExtraType != null)
                 .Where(i => baseNames.Any(b =>
                     i.FileNameWithoutExtension.StartsWith(b, StringComparison.OrdinalIgnoreCase)))
                 .ToList();
diff --git a/Jellyfin.Server/Migrations/MigrationRunner.cs b/Jellyfin.Server/Migrations/MigrationRunner.cs
index c7fa2af0ca..473f62737e 100644
--- a/Jellyfin.Server/Migrations/MigrationRunner.cs
+++ b/Jellyfin.Server/Migrations/MigrationRunner.cs
@@ -18,7 +18,8 @@ namespace Jellyfin.Server.Migrations
         {
             typeof(Routines.DisableTranscodingThrottling),
             typeof(Routines.CreateUserLoggingConfigFile),
-            typeof(Routines.MigrateActivityLogDb)
+            typeof(Routines.MigrateActivityLogDb),
+            typeof(Routines.RemoveDuplicateExtras)
         };
 
         /// <summary>
diff --git a/Jellyfin.Server/Migrations/Routines/RemoveDuplicateExtras.cs b/Jellyfin.Server/Migrations/Routines/RemoveDuplicateExtras.cs
new file mode 100644
index 0000000000..e955363881
--- /dev/null
+++ b/Jellyfin.Server/Migrations/Routines/RemoveDuplicateExtras.cs
@@ -0,0 +1,79 @@
+using System;
+using System.Globalization;
+using System.IO;
+
+using MediaBrowser.Controller;
+using Microsoft.Extensions.Logging;
+using SQLitePCL.pretty;
+
+namespace Jellyfin.Server.Migrations.Routines
+{
+    /// <summary>
+    /// Remove duplicate entries which were caused by a bug where a file was considered to be an "Extra" to itself.
+    /// </summary>
+    internal class RemoveDuplicateExtras : IMigrationRoutine
+    {
+        private const string DbFilename = "library.db";
+        private readonly ILogger _logger;
+        private readonly IServerApplicationPaths _paths;
+
+        public RemoveDuplicateExtras(ILogger<RemoveDuplicateExtras> logger, IServerApplicationPaths paths)
+        {
+            _logger = logger;
+            _paths = paths;
+        }
+
+        /// <inheritdoc/>
+        public Guid Id => Guid.Parse("{ACBE17B7-8435-4A83-8B64-6FCF162CB9BD}");
+
+        /// <inheritdoc/>
+        public string Name => "RemoveDuplicateExtras";
+
+        /// <inheritdoc/>
+        public void Perform()
+        {
+            var dataPath = _paths.DataPath;
+            var dbPath = Path.Combine(dataPath, DbFilename);
+            using (var connection = SQLite3.Open(
+                dbPath,
+                ConnectionFlags.ReadWrite,
+                null))
+            {
+                // Query the database for the ids of duplicate extras
+                var queryResult = connection.Query("SELECT t1.Path FROM TypedBaseItems AS t1, TypedBaseItems AS t2 WHERE t1.Path=t2.Path AND t1.Type!=t2.Type AND t1.Type='MediaBrowser.Controller.Entities.Video'");
+                var bads = string.Join(", ", queryResult.SelectScalarString());
+
+                // Do nothing if no duplicate extras were detected
+                if (bads.Length == 0)
+                {
+                    _logger.LogInformation("No duplicate extras detected, skipping migration.");
+                    return;
+                }
+
+                // Back up the database before deleting any entries
+                for (int i = 1; ; i++)
+                {
+                    var bakPath = string.Format(CultureInfo.InvariantCulture, "{0}.bak{1}", dbPath, i);
+                    if (!File.Exists(bakPath))
+                    {
+                        try
+                        {
+                            File.Copy(dbPath, bakPath);
+                            _logger.LogInformation("Library database backed up to {BackupPath}", bakPath);
+                            break;
+                        }
+                        catch (Exception ex)
+                        {
+                            _logger.LogError(ex, "Cannot make a backup of {Library} at path {BackupPath}", DbFilename, bakPath);
+                            throw;
+                        }
+                    }
+                }
+
+                // Delete all duplicate extras
+                _logger.LogInformation("Removing found duplicated extras for the following items: {DuplicateExtras}", bads);
+                connection.Execute("DELETE FROM TypedBaseItems WHERE rowid IN (SELECT t1.rowid FROM TypedBaseItems AS t1, TypedBaseItems AS t2 WHERE t1.Path=t2.Path AND t1.Type!=t2.Type AND t1.Type='MediaBrowser.Controller.Entities.Video')");
+            }
+        }
+    }
+}